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AT&T on T-mobile S5

Hi, I got a T-mobile S5, and unlocked it. My 3G works but LTE won't register, I am 100% sure that the APN is correct.
Any ideas what I am doing wrong?

-You need an att modem file flashed on your device, but im not 100% sure. Ihave my stock rom files from kies and amoung them is my csc file. Keep reading. Get to know your phone.-
Someone please confirm this is the right route and I will share my csc file with you
Start by rooting your phone and getting a custom recovery (Philz). Check the tmobil section of s5 ...
Sent from my SAMSUNG-SM-G900A using xda app-developers app
EDIT: Thanks all for you input and pointing out the right solution. Always appreciate the fast responses.

Commodore 64 said:
You need an att modem file flashed on your device, but im not 100% sure. Ihave my stock rom files from kies and amoung them is my csc file. Keep reading. Get to know your phone.
Someone please confirm this is the right route and I will share my csc file with you
Start by rooting your phone and getting a custom recovery (Philz). Check the tmobil section of s5 ...
Sent from my SAMSUNG-SM-G900A using xda app-developers app
Click to expand...
Click to collapse
He does not need an AT&T modem flashed on his device. That would most likely result in a brick.
OP: Try dialing *#2263# and make sure automatic is selected. Also go into setting, mobile networks and set it to LTE/GSM/WCDMA

MattMJB0188 said:
He does not need an AT&T modem flashed on his device. That would most likely result in a brick.
OP: Try dialing *#2263# and make sure automatic is selected. Also go into setting, mobile networks and set it to LTE/GSM/WCDMA
Click to expand...
Click to collapse
I tried to do LTE only and it has the right network code, but it won't activate. I checked my ATT online profile and it doesn't have a "LTE" data plan and I think that is the problem. I'll try again tomorrow once it takes effect and report back

kamidake said:
I tried to do LTE only and it has the right network code, but it won't activate. I checked my ATT online profile and it doesn't have a "LTE" data plan and I think that is the problem. I'll try again tomorrow once it takes effect and report back
Click to expand...
Click to collapse
Ok you need to give ATT the IMEI number from one of their LTE android devices. Just go to the store to get one from one of the demo devices. Then your account will be provisioned for LTE.

kamidake said:
I tried to do LTE only and it has the right network code, but it won't activate. I checked my ATT online profile and it doesn't have a "LTE" data plan and I think that is the problem. I'll try again tomorrow once it takes effect and report back
Click to expand...
Click to collapse
The guy above is correct, you need at&t to register your imei into their network to access their LTE.... They should do it for you no problem, just give them a call....however I wouldn't be surprised if they don't! Another way is to find someone with an extra LTE phone and just activate that imei and your LTE should pop up
Sent from my SAMSUNG-SM-G900A using XDA Premium 4 mobile app

Simer03 said:
The guy above is correct, you need at&t to register your imei into their network to access their LTE.... They should do it for you no problem, just give them a call....however I wouldn't be surprised if they don't! Another way is to find someone with an extra LTE phone and just activate that imei and your LTE should pop up
Sent from my SAMSUNG-SM-G900A using XDA Premium 4 mobile app
Click to expand...
Click to collapse
If he registers his T-Mobile S5 on AT&T he will still have problems. AT&T won't recognize the T-Mobile IMEI number, and therefore it will list as a GSM device.
He needs to find an IMEI number of one of AT&T's LTE android devices. Once he has called AT&T CS and have had them provision his account for LTE, then he can just pop in his AT&T sim card to his T-Mobile S5. He'll get LTE then.

MattMJB0188 said:
If he registers his T-Mobile S5 on AT&T he will still have problems. AT&T won't recognize the T-Mobile IMEI number, and therefore it will list as a GSM device.
He needs to find an IMEI number of one of AT&T's LTE android devices. Once he has called AT&T CS and have had them provision his account for LTE, then he can just pop in his AT&T sim card to his T-Mobile S5. He'll get LTE then.
Click to expand...
Click to collapse
What he said.

What are your APN settings? I have T-Mobile S5 on AT&T and have LTE working.

dustintinsley said:
What are your APN settings? I have T-Mobile S5 on AT&T and have LTE working.
Click to expand...
Click to collapse
Just wondering where did you unlock the phone from and how long did it take to get the unlock code?

Thanks for everyone's help. I am good to go.
I took a SIM from another LTE device. I think it does need to be registered as a IMEI from an ATT device and that was the problem.

kamidake said:
Thanks for everyone's help. I am good to go.
I took a SIM from another LTE device. I think it does need to be registered as a IMEI from an ATT device and that was the problem.
Click to expand...
Click to collapse
Now that you are getting AT&T LTE on the T-Mobile variant, can you please comment on LTE signal strength? This is a deal breaker for me. When I had the TMO Note 3 on AT&T, LTE reception sucked. If you can compare it with an AT&T branded phone, that would be great.

Another person using the G900T. Congrats
My experience is that coverage is just as good if not better. Same radio, same antenna, I wouldn't expect it to be any different?

The TMO GS5 has all the needed ATT LTE Bands no need for a radio flash, I'm using one on ATT now, have gotten LTE from day 1, as stated only requirement is the sim has to be originally activated on a LTE ATT device and that the APN is set properly.

What kind of speed is everyone getting with the tmo s5 on att network? I have an att s5 next to a tmo s5 and att s5 is getting 50mbps vs tmo at 20mbps. I am wondering if I needed to configure something on the tmo devices?

vince2398 said:
What kind of speed is everyone getting with the tmo s5 on att network? I have an att s5 next to a tmo s5 and att s5 is getting 50mbps vs tmo at 20mbps. I am wondering if I needed to configure something on the tmo devices?
Click to expand...
Click to collapse
Check your APN setting. The T-Mobile S5 should have the same exact APN settings your S5 has. Can you also comment on LTE reception on the T-Mobile S5 using AT&t?

MattMJB0188 said:
Check your APN setting. The T-Mobile S5 should have the same exact APN settings your S5 has. Can you also comment on LTE reception on the T-Mobile S5 using AT&t?
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Click to collapse
APN is exactly the same as AT&T one. Reception is also same as AT&T one but the speed is a show stopper if it's half the speed. Any one have any ideas?

vince2398 said:
APN is exactly the same as AT&T one. Reception is also same as AT&T one but the speed is a show stopper if it's half the speed. Any one have any ideas?
Click to expand...
Click to collapse
I wouldn't sweat the speeds, unless you keep noticing it. Try again later. Perhaps the T-Mobile S5 needs a modem update? Keep us posted.

vince2398 said:
APN is exactly the same as AT&T one. Reception is also same as AT&T one but the speed is a show stopper if it's half the speed. Any one have any ideas?
Click to expand...
Click to collapse
Have the speeds improved?

MattMJB0188 said:
If he registers his T-Mobile S5 on AT&T he will still have problems. AT&T won't recognize the T-Mobile IMEI number, and therefore it will list as a GSM device.
He needs to find an IMEI number of one of AT&T's LTE android devices. Once he has called AT&T CS and have had them provision his account for LTE, then he can just pop in his AT&T sim card to his T-Mobile S5. He'll get LTE then.
Click to expand...
Click to collapse
I would also like to do this, but I just want to clarify something. I just bought an AT&T S5. Brand new, unopened, still in the box. I want to swap it for a T-Mobile S5, as the bootloader is unlocked. If I keep the AT&T SIM card before I sell it, and put it into the new Tmo S5, will I have any foreseeable issues? Will it work just like that, or will I need to retrieve something from my S5 before I swap it?
Thanks.
EDIT: I should clarify that the device is unactivated, and when I do activate it, I will be porting my existing number from Verizon.

[Q] Play Store Version and Verizon

Has there been any confirmation or otherwise on whether or not the Play Store version will be able to be activated on Verizon?
I know there's only one SKU and I know that the Nexus 5 was able to be activated on Sprint, T-Mobile, and AT&T so I'm inclined to believe the Play Store device can be activated on any of the major carriers.

i've got similar questions.
like you, i wonder if this 1 "US" model is essentially identical across the board. i wonder if the play store variant can be activated on either cdma or gsm. i also wonder if there's a difference in the play store N6 and the N6 on motorolas web store. i guess i'm really just wondering if all the bootloaders can be unlocked, no matter where you purchased your Nexus 6.

There's only 2 models one for American one for the rest of the world. I have some doubts that Verizon will activate one from the play store only because they might require the imei to already be in their system as in bought from them. But it's possible to have them add your imei after the fact. Or at least sprint was able to with the N5

GTvert90 said:
There's only 2 models one for American one for the rest of the world. I have some doubts that Verizon will activate one from the play store only because they might require the imei to already be in their system as in bought from them. But it's possible to have them add your imei after the fact. Or at least sprint was able to with the N5
Click to expand...
Click to collapse
My understanding is with Verizon, if you already have an activated nano-SIM, you can just put it in the Nexus 6 and it would work (if you set the APN details right). Can anyone confirm this?

smbruck said:
My understanding is with Verizon, if you already have an activated nano-SIM, you can just put it in the Nexus 6 and it would work (if you set the APN details right). Can anyone confirm this?
Click to expand...
Click to collapse
This is my understanding

The problem with VZW is you can't just out your Sim into a phone that doesn't have its IMEI/MEID white listed in their system because of the CDMA part. I'm hoping that all of the IME/MEID of all the Nexus 6s will be added but we have no confirmation and VZW won't comment on the matter.

I hope they don't even have to add the imei it should just work.

joshua.justice said:
I hope they don't even have to add the imei it should just work.
Click to expand...
Click to collapse
It wont just work on the cdma side .... Just like sprint and the nexus 5 they will have to manually add the imei to thier system. But should be easy .It may stop people from upgrading and keeping unlimited data but that is another thing in itself

nexus6R3plicant said:
It wont just work on the cdma side .... Just like sprint and the nexus 5 they will have to manually add the imei to thier system. But should be easy .It may stop people from upgrading and keeping unlimited data but that is another thing in itself
Click to expand...
Click to collapse
How can you be certain it won't?

Cdma doesnt work like gsm you can't just insert sim card and it work ... You could buy the n5 from Google and sprint had to manually add imei to system or you would not get 1x or 3g putting sim in only got you lte . should be the same again with both carriers now

nexus6R3plicant said:
Cdma doesnt work like gsm you can't just insert sim card and it work ... You could buy the n5 from Google and sprint had to manually add imei to system or you would not get 1x or 3g putting sim in only got you lte . should be the same again with both carriers now
Click to expand...
Click to collapse
But if you buy it from them it should work automatically? And is there any way for them to know if I get one from t mobile instead of Google and try to use it on their network?

joshua.justice said:
But if you buy it from them it should work automatically? And is there any way for them to know if I get one from t mobile instead of Google and try to use it on their network?
Click to expand...
Click to collapse
It's not going to work and unless your phone has a nano sim in it right now ie a iPhone your going to have to call and get it activated on your account... Like i said the imei on sprint had to be added until then you would only get lte .... Without a activated nano sim you won't get anything

nexus6R3plicant said:
It's not going to work and unless your phone has a nano sim in it right now ie a iPhone your going to have to call and get it activated on your account... Like i said the imei on sprint had to be added until then you would only get lte .... Without a activated nano sim you won't get anything
Click to expand...
Click to collapse
Okay, so I can cut it down and if that doesn't work get a new SIM. Can they tell the sim size based on the iccid number?

bloodiedwraith said:
Has there been any confirmation or otherwise on whether or not the Play Store version will be able to be activated on Verizon?
I know there's only one SKU and I know that the Nexus 5 was able to be activated on Sprint, T-Mobile, and AT&T so I'm inclined to believe the Play Store device can be activated on any of the major carriers.
Click to expand...
Click to collapse
The Verge said, "The Nexus 6 is going to be sold unlocked for $649... The unlocked model will work on all four major US carriers."

Straight talk
I was wondering if I will be able to use this on the Straight talk CDMA network. Seeing the Nexus 5 was not sold by Verizon that made sense, but since Verizon will have the Nexus 6 I am hoping I will be able to use this phone on Straight talk using CDMA network. I am currently on AT&T and am waiting for the N6 release to switch over to ST, but I really need to know if I can use this phone if I switch. Anyone have an idea or is it still to early to know something like this?

stunnedjack said:
I was wondering if I will be able to use this on the Straight talk CDMA network. Seeing the Nexus 5 was not sold by Verizon that made sense, but since Verizon will have the Nexus 6 I am hoping I will be able to use this phone on Straight talk using CDMA network. I am currently on AT&T and am waiting for the N6 release to switch over to ST, but I really need to know if I can use this phone if I switch. Anyone have an idea or is it still to early to know something like this?
Click to expand...
Click to collapse
I don't think you'll be able to use the N6 on Straight Talk CDMA. I can't use my Verizon Moto X on it. Only a CDMA flip phone was accepted.
You'll be able to use it he N6 on Straight Talk GSM network.

rebretz000 said:
I don't think you'll be able to use the N6 on Straight Talk CDMA. I can't use my Verizon Moto X on it. Only a CDMA flip phone was accepted.
You'll be able to use it he N6 on Straight Talk GSM network.
Click to expand...
Click to collapse
Ya, that is what I figured, not the worst thing to stay with the GSM network but I would have preferred the CDMA. Thanks.

stunnedjack said:
Ya, that is what I figured, not the worst thing to stay with the GSM network but I would have preferred the CDMA. Thanks.
Click to expand...
Click to collapse
I'm leaving CDMA for GSM once I get my hands on some Nexi 6.
Giving up both my Verizon Unlimited lines to go with AT&T.

rebretz000 said:
I'm leaving CDMA for GSM once I get my hands on some Nexi 6.
Giving up both my Verizon Unlimited lines to go with AT&T.
Click to expand...
Click to collapse
I hope you're giving (or selling) those unlimited lines to someone and not just cancelling — people would kill for those!

NOTashwin said:
I hope you're giving (or selling) those unlimited lines to someone and not just cancelling — people would kill for those!
Click to expand...
Click to collapse
I was going to try and sale them on ebay. I was looking, doesn't look like they go for as much as they use to. I'm hoping to get enough to make it worth it. At least $200 per line. But maybe with the Nexus 6 the price will go back up.

Unlocked sprint note 4 sm-910p on tmobile

Wondering if there are any tmobile roms that work on a unlocked sprint version. I'm using a sprint rom now and it works ok. Just want to be the most compatible with tmobile as possible. I am a noob to using unlocked phones. I was with sprint for 10 + years and just switch to tmobile last week. Thanks in advance
Update- i flashed the the tmobile maximum ovrdrive n5 rom and its working great! Came from a sprint hybrid note 5 rom. Wiped and did a clean install and everything works great. Still no lte but my 4g has gotten better speeds. My new question is im still on my sprint ok1 modem should i try a tmobile modem or stay with it the way i have it?

I don't believe you can use a sprint phone on tmobile. Different network. And as for the rom. I don't think there are. I could be corrected but sprint phones are only good on sprints network and that's it.

macasus76 said:
I don't believe you can use a sprint phone on tmobile. Different network. And as for the rom. I don't think there are. I could be corrected but sprint phones are only good on sprints network and that's it.
Click to expand...
Click to collapse
Modern sprint phone support T-Mobile and ATT's HSPA network. Heck I used my unlocked Sprint S4 on ATT for about 5 months without any issues. Only thing was that I didn't get LTE.
Sent from my Nexus 6P using Tapatalk

using a sprint note 4 with tmobile rom just failed to get it passed edge network cant get 3G/4G

macasus76 said:
I don't believe you can use a sprint phone on tmobile. Different network. And as for the rom. I don't think there are. I could be corrected but sprint phones are only good on sprints network and that's it.
Click to expand...
Click to collapse
I already have my sprint note 4 unlocked and working on t mobile Just don't get lte. Was wondering if a tmobile rom with the right modem would allow me to get lte. Maybe if a dev can make one or something

Straight Talk

Can i use straight talk on this phone? I am assuming I would need to use the Verizon SIM card (CDMA LTE) kit? I only ask because Straight Talk's website claims the phone is incompatible based on the IMEI #. I have the XT1254.

Raistlen0 said:
Can i use straight talk on this phone? I am assuming I would need to use the Verizon SIM card (CDMA LTE) kit? I only ask because Straight Talk's website claims the phone is incompatible based on the IMEI #. I have the XT1254.
Click to expand...
Click to collapse
You could also use it on "AT&T" and "T-Mobile" Straight Talk. You would only get LTE bands 2 & 4 for both those carriers, but would also have access to HSPA bands.
The Droid Turbo is carrier unlocked. Many people use it on T-Mobile and AT&T.

ChazzMatt said:
You could also use it on "AT&T" and "T-Mobile" Straight Talk. You would only get LTE bands 2 & 4 for both those carriers, but would also have access to HSPA bands.
The Droid Turbo is carrier unlocked. Many people use it on T-Mobile and AT&T.
Click to expand...
Click to collapse
Thanks for the reply that is how I understood it. I was just confused as to why Straight Talk was telling me it was incompatible. Perhapse they "know" I still owe Verizon one more payment on it.
Another question: I know you use ATT; do you know of a map that shows what bands ATT uses where for LTE?

Raistlen0 said:
Thanks for the reply that is how I understood it. I was just confused as to why Straight Talk was telling me it was incompatible. Perhapse they "know" I still owe Verizon one more payment on it.
Another question: I know you use ATT; do you know of a map that shows what bands ATT uses where for LTE?
Click to expand...
Click to collapse
I know LTE Discovery app captures location LTE bands, but I don't know if they have a public map the way Open Signal does.
Open Signal shows LTE availability for various carriers, but I don't they differentiate by which band.

Raistlen0 said:
Thanks for the reply that is how I understood it. I was just confused as to why Straight Talk was telling me it was incompatible. Perhapse they "know" I still owe Verizon one more payment on it.
Click to expand...
Click to collapse
Yes, you probably don't have a "clean" IMEI right now.
Once your contract is fulfilled, it will probably show OK.

Unlocked sprint LG V40 good for Verizon/GSM carriers?

Hi, I was wondering if an unlocked Sprint LG V40 is good for any other US carriers? any band restriction? Many Thanks.

As far as I know I have the full V40 ThinQ LM-V405UA network unlocked and factory unlocked version and it works well with ATT and T-Mobile as well with sprint am not sure if it will work with Verizon because as you know Verizon and Sprint do NOT like to support each other's phones even though they are in most cases IDENTICAL in every way.
I did do a check on verizon BYOD site and it says Mine is NOT compatible with there system as I had guess it would say that.

zxhwk said:
As far as I know I have the full V40 ThinQ LM-V405UA network unlocked and factory unlocked version and it works well with ATT and T-Mobile as well with sprint am not sure if it will work with Verizon because as you know Verizon and Sprint do NOT like to support each other's phones even though they are in most cases IDENTICAL in every way.
I did do a check on verizon BYOD site and it says Mine is NOT compatible with there system as I had guess it would say that.
Click to expand...
Click to collapse
Hi Zxhwk, do you know if T-Mobile Wifi Calling is working and do you get full 4G LTE speed on T-Mobile? I don't know if there are some bands missing for T-Mobile 4G LTE.

maskenvn said:
Hi Zxhwk, do you know if T-Mobile Wifi Calling is working and do you get full 4G LTE speed on T-Mobile? I don't know if there are some bands missing for T-Mobile 4G LTE.
Click to expand...
Click to collapse
I'd really like to know this as well.
LM-V405UA is way cheaper used than a LM-V450TAB!

I'm using unlocked sprint with Verizon network, works fine except advanced calling when you use your data together with the call. Spring uses different technology for that which does not work on Verizon. Also voice mail notification does not work. Otherwise no issues

Can the Verizon image be flashed to the sprint hardware (which appears to be identical) to get the Verizon advanced calling features?

kptkill said:
Can the Verizon image be flashed to the sprint hardware (which appears to be identical) to get the Verizon advanced calling features?
Click to expand...
Click to collapse
Yes you can flash the Verizon KDZ

Can I replace the motherboard from a Verizon or AT&T LG V40 with a T-Mobile one? I ask because the T-Mobile LM-V405TA can't be rooted and it would be cheaper to buy a motherboard than a whole nother phone.