Database Develop

[Q] 850mhz band broken on my phone? (''Unable to connect. Try later'' got me crazy):

Hello guys! I've been reading these forums for a long time, amazing what you guys do in here
Here is my problem: I live in México, and I traveled to USA for summer vacation, my mexican mobile phone carrier uses 850mhz (TELCEL) and when I went to USA it was using ATT's network.
So everything was working fine, but when I returned just before I was about to cross the border, it stoped working!
It has a message that says ''Emergency calls only'' where it's supposed to say ''TELCEL GSM'', so no internet, no calls, no messages.
I was using Froyo on my phone, and thought of doing a reset to restore factory settings on the phone, but it did not work :/
Then I updated my phone to Darky's Rom 10.2 (Gingerbread) and it's still not working!
When I go to Settings>Wireless and network>Mobile networks>Network operators I can see that my carrier is available to select, but when I try to, it gives me a ''Unable to connect. Try later'' msg.
It is really frustrating because I depend on my phone so much, mainly because I share my 3G connection to my laptop for school's work and stuff.
There's one weird thing though, I unlocked my phone, and placed a MOVISTAR(1900mhz) SIM card on it, AND IT WORKS!!!
But the thing is that I don't have internet on that SIM card(is prepaid and it's EDGE, not 3G), and on my TELCEL SIM card I have a contract to complete (still a year to go).
When I put my SIM card on someone else's phone, it works like a charm, but if I try to put a TELCEL (850mhz) SIM on my galaxy; just says ''Only emergency calls''
What do you guys think happened to my phone? I would really appreciate your help.

flash a new modem... one that contains more frequencies enabled.. any bell or telus will do.
UGKC1 modem should fix your problem.

It did not work, should I keep trying with other modems?

you can.. jk4 or jl2 are other modems with 850 and 1900 enabled... maybe your problem is different then I thought... but it sounds like your modem... maybe try unlocking your phone? if you can connect to wifi download sgs unlocker pro (paid app) in the market to unlock, your phone also needs to be rooted. are you using the i9000T? that may be different problem altogether...
edit: sorry I see you said it is unlocked... just doesn't sound like it...
a) modem related (ugkc1) should have fixed that
b) SIM carrier not compatible to phone (unlock phone to fix)
c) Busted SIM card, check in other phone
d) make sure phone option is set to Automatic CDMA/GSM
sounds like you checked everything I would check....
does your 3G work... make sure your VPN is setup to your carrier

maybe imei got blocked...? only way around that is to get provider/samsung to unblock

Hey have you solved this, I have the same problem

my solution
http://forum.xda-developers.com/showpost.php?p=25509654&postcount=279

SIM Unlock Code Screen Missing

Hi All,
I apologize in advance if that has been posted and responded to, but my searches have been unfruitful. My boss has the Motorola Droid 3, stock rom, NOT rooted on the Verizon network (in NYC). He will be traveling abroad to the mid-east and contacted VZW Global Services and they provided him with the SIM Unlock code.
I then proceeded to insert my AT&T SIM card into his phone and booted it up - in anticipation of the SIM Unlock Code screen so that when he gets to his destination country, all he'll have to do is insert the SIM card which he will purchase there.
Unfortunately, no such screen appeared. I was able to access the phone's other functions and was even able to go into Settings>Wireless Settings and switched the device to GSM/UMTS only (from the default 'Global' setting). Still, nothing occurred. I then forced it to search for a network (even though automatically connect was checked) and believe it or not, midway through its search, the phone completely rebooted on its own. I thought that maybe NOW, when the phone finishes loading, that it will ask me for the SIM Unlock Code. Well, it didn't. The phone just booted up normally and indicated that there was no service (bars with the red circle and slash through it).
We called Global Services back and they claimed that we will not see a SIM Unlock code for any US-Domestic carrier SIM cards (sounds fishy to me) and the SIM Unlock Code screen will appear ONLY when a Foreign/Non-US Carrier SIM Card is placed in the phone. My suspicion is that the Global Services rep doesn't know the difference b/t his a** and his elbow and was just saying anything that seemed plausible to get me off the phone. It would be VERY BAD if my boss travels to his destination and operates on the assumption that this will work once he inserts a foreign SIM card and for it not to work at all.
Any thoughts/insights into this would be VERY much appreciated and if this topic was already discussed on another thread, I would very much appreciate the link to that thread.
I have seen similar topics on other phone model threads, but none of the instructions in each of those respective threads had a solution that seemed applicable to this specific problem.
Many MANY thanks in advance!
--Q

You should most certainly see an unlock screen with a US based sim card. I used an old deactivated T-Mobile Sim card to get my unlock code prompt. try going to the phone dialer and enter *#*#4636#*#* - give it a sec and a menu will come up. In the menu scroll down a bit and you'll see a network selection bar. Tap the bar and select GSM Auto (PRL). You should immediately get a popup or perhapse after you back out of it. If not, scan for networks again. If it still gives you problems - PM me and we'll get it figured out.

network SIM unlock screen missing for T-Mobile US
Folks,
I am experiencing a similar issue as the original poster. No matter what I do, I can not get the Droid global (stock rom, v2.3.3) to attach to the T-Mobile network. If I follow the instructions"
*#*#4636#*#* - give it a sec and a menu will come up. In the menu scroll down a bit and you'll see a network selection bar. Tap the bar and select GSM Auto (PRL) ".
I see the screen momentarily flash the t-mobile network, then switch back to indicating that the network type is CMDA-1xrtt. Any guidance would be greatly appreciated.
BTW this sim works fine in a BB Bold 9000. Also it is just a simple voice/messaging sim - no data plan.
Never mind - after more research, seems I have a phone with the US carriers locked out. - off to see if I can update it

areyouwireless said:
Folks,
I am experiencing a similar issue as the original poster. No matter what I do, I can not get the Droid global (stock rom, v2.3.3) to attach to the T-Mobile network. If I follow the instructions"
*#*#4636#*#* - give it a sec and a menu will come up. In the menu scroll down a bit and you'll see a network selection bar. Tap the bar and select GSM Auto (PRL) ".
I see the screen momentarily flash the t-mobile network, then switch back to indicating that the network type is CMDA-1xrtt. Any guidance would be greatly appreciated.
BTW this sim works fine in a BB Bold 9000. Also it is just a simple voice/messaging sim - no data plan.
Never mind - after more research, seems I have a phone with the US carriers locked out. - off to see if I can update it
Click to expand...
Click to collapse
You can follow the guide to have the phone work and it will fix that.
Sent from my DROID3 using XDA

You need to use a foreign Sim card, not an American one because Verizon disabled access to all other American gsm networks
Sent from my DROID3 using Tapatalk

eXecuter.bin said:
You need to use a foreign Sim card, not an American one because Verizon disabled access to all other American gsm networks
Sent from my DROID3 using Tapatalk
Click to expand...
Click to collapse
i have the same phone from bell and same issue, does it mean i require to do the same as well ?

queberican351 said:
You should most certainly see an unlock screen with a US based sim card. I used an old deactivated T-Mobile Sim card to get my unlock code prompt. try going to the phone dialer and enter *#*#4636#*#* - give it a sec and a menu will come up. In the menu scroll down a bit and you'll see a network selection bar. Tap the bar and select GSM Auto (PRL). You should immediately get a popup or perhapse after you back out of it. If not, scan for networks again. If it still gives you problems - PM me and we'll get it figured out.
Click to expand...
Click to collapse
I was to access the screen you mentioned however I was unable to get it to ask for my unlock code, any ideas?

I had the same issue. The unlock code was already put in. Though this may be, there is more you need to do to have it working on US carriers like AT&T.
The guide is here
Sent from my XT862 using Tapatalk 2

quordandis said:
Hi All,
I apologize in advance if that has been posted and responded to, but my searches have been unfruitful. My boss has the Motorola Droid 3, stock rom, NOT rooted on the Verizon network (in NYC). He will be traveling abroad to the mid-east and contacted VZW Global Services and they provided him with the SIM Unlock code.
I then proceeded to insert my AT&T SIM card into his phone and booted it up - in anticipation of the SIM Unlock Code screen so that when he gets to his destination country, all he'll have to do is insert the SIM card which he will purchase there.
Unfortunately, no such screen appeared. I was able to access the phone's other functions and was even able to go into Settings>Wireless Settings and switched the device to GSM/UMTS only (from the default 'Global' setting). Still, nothing occurred. I then forced it to search for a network (even though automatically connect was checked) and believe it or not, midway through its search, the phone completely rebooted on its own. I thought that maybe NOW, when the phone finishes loading, that it will ask me for the SIM Unlock Code. Well, it didn't. The phone just booted up normally and indicated that there was no service (bars with the red circle and slash through it).
We called Global Services back and they claimed that we will not see a SIM Unlock code for any US-Domestic carrier SIM cards (sounds fishy to me) and the SIM Unlock Code screen will appear ONLY when a Foreign/Non-US Carrier SIM Card is placed in the phone. My suspicion is that the Global Services rep doesn't know the difference b/t his a** and his elbow and was just saying anything that seemed plausible to get me off the phone. It would be VERY BAD if my boss travels to his destination and operates on the assumption that this will work once he inserts a foreign SIM card and for it not to work at all.
Any thoughts/insights into this would be VERY much appreciated and if this topic was already discussed on another thread, I would very much appreciate the link to that thread.
I have seen similar topics on other phone model threads, but none of the instructions in each of those respective threads had a solution that seemed applicable to this specific problem.
Many MANY thanks in advance!
--Q
Click to expand...
Click to collapse
I c, U have to use Non-US SIM CARD. otherwise U have to unlock the US radio first. but if U having trouble to pop the SIM Network Unlock Code screen, just put non-US SIM and set the mobile network from global to gsm/umts. these also apply to those whose troubled with subsidy lock, so they can input the code.

Worked for me with tmobile or att sim card in the phone. You have to backup rename the build.prop file in the system(Rename the old build.prop to build.bak) put the new build.prob file in the system, restart the phone and wa-la, it will ask you for an unlock code. Enter it give it 15 or so sec reboot the phone, select GSM/UMTS and wait 30sec to 2mins you will receive a signal.

Note I9220 no signal in UK problem

Hi All
I bought my galaxy note i9220 in China on 18th Aug. It is a genuine phone, NOT a clone just to note.
It was working perfectly fine when I was in China using a China Mobile SIM card.
Last Sunday I went to hongkong to catch a flight to London, and when I was in Hong kong, I changed back to my UK 3 SIM card, which again, was working OK in hongkong.
Before flight took off, I switched the phone off.
During the flight, I must have hit some button and accidently switched the phone on ( as when I landed, I took my phone out and it was “ON” with no signal).
Ever since I landed in Heathrow, I got no signals. The phone shows I can only make emergency calls.
I have tried all of the below but none worked:
1) Switching the phone off & on.
2) Take out battery (while phone was off) & SIM and put them back later.
3) Take out battery (while phone was on) & SIM and put them back later.
4) Reset to manufactory status.
When I go to Setting – Wireless & Network – Mobile Network – Search operator, I can see “3” in the list of operator, but when tried to connect to it, it said “Unable to connect to the network”.
The “3” sim worked fine in my old NOKIA phone so I don’t think it’s a problem on the SIM.
Anyone able to help? Thanks sooo much!

a suggestion..try to make sure you inserted the sim card with the bend angle facing the bottom of your phone..sometimes you insert your sim in a wrong way and this cause your problem..am not trying to be funny but it happen with quite a lot of people including me...
or Could be a fault on your phone..and these things happen..
or your sim is invalid for a reason..i suggest to get a pay as you go 3 uk sim card and try it ...or call 3 customer service and speak to one of their agents to have a look at your account ... they might send you another sim or pop in one of their stores and speak to someone about it...if nothing wrong with your account then am afraid it is a hardware issue with your phone..

Are you sure the phone is not a 4G phone?
This won't work in the UK as our Cell's are different as well.
Also: http://www.chinaphonereview.com/hdc-galaxy-note-plus-gt-n7000-i9220

scorpion100 said:
a suggestion..try to make sure you inserted the sim card with the bend angle facing the bottom of your phone..sometimes you insert your sim in a wrong way and this cause your problem..am not trying to be funny but it happen with quite a lot of people including me...
or Could be a fault on your phone..and these things happen..
or your sim is invalid for a reason..i suggest to get a pay as you go 3 uk sim card and try it ...or call 3 customer service and speak to one of their agents to have a look at your account ... they might send you another sim or pop in one of their stores and speak to someone about it...if nothing wrong with your account then am afraid it is a hardware issue with your phone..
Click to expand...
Click to collapse
The sim works fine on my old Nokia phone, and i tiredputing the SIM different ways but still no luck....anooying thins is the phone was working fine but started to give me prob. as soon as i landed UK...

santoz said:
Are you sure the phone is not a 4G phone?
This won't work in the UK as our Cell's are different as well.
[/url]
Click to expand...
Click to collapse
Got my mum called the phone provider back in CHina they said it should be ok to use in the UK.
They asked me to check my SIM freuency (or sth like this). and said as long as it is on GSM900/1800/1900MHZ, then it should work...what is that???

Try change your network settings between the options, gsm, hspa, and wcdma. Think it's settings, more, mobile networks, network mode.
Probably one of those should sort you out.

hkgrob said:
Try change your network settings between the options, gsm, hspa, and wcdma. Think it's settings, more, mobile networks, network mode.
Probably one of those should sort you out.
Click to expand...
Click to collapse
Thanks.
When i went into the"mobile networks", the phone started auto search of network.
And it returns network lists:
3
O2 (forbidden)
Vodafone (forbidden)
I understand the 2 being forbidden as im not a custmer of either O2 or VDF, but it just does not allow me even to connect to 3..grrr very anooying.....
I will try changing the settings when i get home today.

hkgrob said:
Try change your network settings between the options, gsm, hspa, and wcdma. Think it's settings, more, mobile networks, network mode.
Probably one of those should sort you out.
Click to expand...
Click to collapse
THere is no network mode in the mobile network ....how can i change the mobile network type in the SGN?

Note 5 at&t emergency calls only issue.

Hello. About a 4 months ago i have bought from eBay a note 5 at&t version. I live in Greece and my network operator is WIND GR. The phone works fine but from time to time i get an emergency calls only message. And i can't get and do a phone call. If i restart the phone everything goes to normal. Sometimes it goes on and off by itself (the problem).
Have been anyone experiencing the same issue? If the phone is incompatible with my network operator should it not work at all?

Did you tried to change the sim card? Maybe issue is from sim or from sim slot

johnny.goldy said:
Did you tried to change the sim card? Maybe issue is from sim or from sim slot
Click to expand...
Click to collapse
My sim is new. When i purchased the phone i have changed my old sim with a new sim 4g compatible.

It happened again. And i am missing calls like this. I will smash it with a hammer

Go to settings, backup and reset, then reset only network settings, see if any better signal

johnny.goldy said:
Go to settings, backup and reset, then reset only network settings, see if any better signal
Click to expand...
Click to collapse
Done that right now. Tomorrow i will get a new sim card and i will post if anything gets better. Thanks for the help.

Update of the situation. I have changed sim card 2 times. It still happening. My phone runs at nougat now and the problem still appears as before at 5 and 6 Android version. I currently gonna change service provider that has better and stronger signal. From what i have discovered. When the phone looses signal due too poor service provider signal sometimes it can't register to network by itself. If i enable airplane mode and then turn it off it comes back. Any clue? If it's hardware issue what can i change?

Should i have at the mobile networks auto detect or manual and my carrier?

Samsung note 9 N9600 VZW network issue

Hi guys,
My toy is a samsung note N 9600 and its factory unlocked. Last week ported out from T-mobile to keep my original number and facing a wried issue.
The day I ported out from T-mobile, VZW network couldnt be recognized when I tried to activate the VZW sim card. "No network connection." and no call or text can be made. However, after I RESET my device to factory model, it SUCCESSFULLY recognized VZW and LTE function works well. Sounds wried? The story doesnt end here.
Yesterday after I turned off the VZW sim card by accident-- n9600 is a dual sim card which allows you to turn either sim card off-- the network connection lost again, im not talking about LTE connection, but all network service including internet, phone call and text function. Tried a lot to get the connection back but failed. Guess what? RESET, THEN VZW comes back!!! Being driven by curiosity, I turned off the sim card agian, and then, as my expect, no network connection. Ok, rest---works---turning off sim card---no connection---reset……
I am really annoyed by this and have no idea why it is. So if anyone of you have clue of it, plz let me know. Thank you in advance!
Teddy

No one experienced same issue before?