Database Develop

G1 and T-mobile Question

I think this is the best place for this question.
I have a G1 now and am considering moving over to the Nexus one. My wife and I are on the family plan and we want to keep that going. Currently she only had a basic phone with basic cell service. I have the basic cell service with the Data Plan added to my line. Her contract is up and she can get a new phone, which is good because her Motorola is getting flakey. Anyhow she wants to start doing text messaging with family. So she wants a new phone that has a full keyboard for texting. She doesn't need/want the data plan as it is $30/mo that she won't use. The problem is that all the phones with full keyboards require a data plan. She is a stay at home mom so if she needs the internet she get on a computer. So my thoughts were to get the new Nexus One for me @ $533 for the unsubsidized rate. I take my SIM out of my G1 put it in the N1. Move her sim from her Motorola over to my old G1 then turn on texting on the her line.
She wouldn't be paying for data and I could just set the G1 up to use our Wifi anyhow. Not that it would be used for anything but updating and installing new apps. So it should be fine. I could wipe the phone and set it up on her Gmail account before pulling my sim so I could then configure Wifi.
Does anyone see any flaws in my thinking? I have already put her sim in my G1 as a test and it could make a receive calls on her number. The one thing that I did notice is that it said it had 3G coverage but I didn't try it.
Thanks

Well I was out running around today and stopped into the local T-mobile shop to run these questions across them.
Basically they said that it should be fine. They would only be concerned if I were trying to disable the data plan on my account while still under contract. Since I will be maintaining my data plan for use on the Nexus there are no concern. He said that I may have issues when trying to set up the phone for Her. I mentioned I could wipe the phone and set it up on her Gmail account before moving my SIM. He said that once her SIM is in it may have and issue the first time it powers on. He said that worst case we could come down to the store and turn on the data plan for an hour or so and get it updated then they could turn it off.
He also mentioned that I may have problems accessing the App Market as they were told that it needs the data network to function. However he admitted that he can access the App Market just fine on his old G1 at home over his Wifi and no SIM Card. So he again thought that I would be OK. The only real issue that I can see is that I may not be able to get OTA updates. That shouldn't be a big deal because the phone is rooted and I am running a cooked ROM on it. We plan on leaving it that way and I will be doing updates in that manner.
So it looks like my questions are answered. I am posting the resolution as others may have the same question.

[Q] I have tmobile, with Data plan, but does not work on my G1

So I've done plenty of searching, enough so that I was able to unlock my phone without the data working, rooted my phone, flashed and modded it, successfully running newest Biffmod.
That being said, i'm 100000% sure I have a working data plan, my plan is unlimited everything.
Works fine in any of my other phones, Dash 3G, HTC HD2, Unlocked Samsung blackjack i607.. The difference, those are all windows mobile phones?
But the HTC HD2 Dual boots android 2.2 froyo and data works there.
Yup, same sim I'm talking about, same plan, just different phones.
Any Idea why my data plan is not working with the G1? Am I doing something wrong? It worked when i FIRST got this phone (ordered it off ebay not that long ago to play with).. After factory reset/wipe before modding is when it all went sour.
Was stuck on log in screen so I had to do the work around to get into the phone, obviously not with Biffmod I can skip.. But I cant use market place, check e-mail, ANYTHING data related. Yet my Icon says 4 bars, 3G and I even see the "up" and "down" data xfer arrows giving me activity.
It's as if it's "there" just not working.
Any help would be great appreciated, I plan to go to T-mobile and hopefully one of the people there will actually have some tech savvy.. Wishful thinking.
Long story short, I just want my data to work. Please, and thank you.

Do a search on here for the correct APN setings for your provider.
edit: here's the thread http://forum.xda-developers.com/showthread.php?t=475564

Read the thread, it's for ATT users trying to use a T-Mobile phone.
The issue is that I actually have T-mobile.

I'm fairly sure I saw the apn settings for t-mo in there too. That's probably what you should be checking first.
Sent from my G1 using XDA App

Just google Tmobile's US apn settings or grab them from another of your devices, then it will work.

Perfect, I'll give that a shot when I get home from work today, thanks for all the help so far.

[Q] Is AT&T 3G on T-Mobile Possible?

I have tried to search the forums for answers, but I keep finding a lot of non-definitive results (and many reference FAQs for the Galaxy S phone).
I have a T-Mobile Galaxy tab that is running stock T-Mobile Firmware. I also have an active AT&T SIM card via my job.
I have unlocked my tab and created a custom APN that allows me to use the AT&T SIM on EDGE.
I understand that AT&T and T-Mobile use different frequency bands for their 3G, but I am unsure if these frequencies are completely unavailable on opposing characters or if they are just disabled in firmware/software.
Is there a modem.bin (or other firmware) that will allow we to flash a T-Mobile Galaxy Tab and use an AT&T SIM for 3G? If so, is there a firmware to revert it back if there are issues?
I don't really care about voice (at the moment) but it would be nice to use the unlimited AT&T 3G card instead of paying month-to-month with T-Mobile.

Why dont you unlock and try? I know rotohammer posted instructions on how to unlock. He also posted a complete package to flash to stock.

NO, it's not possible!

joedoe said:
NO, it's not possible!
Click to expand...
Click to collapse
Do'h!
Is is a hardware or a software issue? i.e. can I ever hope that someone might figure out how to do this?
I have only had my tab for about a week; If it is never I may re-consider returning and purchasing one on from AT&T...

clubtech posted the modem.bin for AT&T here.
http://forum.xda-developers.com/showpost.php?p=9342507&postcount=47
If you're willing to test it, please let us know how it goes! I'm interested, but I'm scared that AT&T will screw up my current plan. They've done it before - swapped from iPhone 3GS to Palm Pre Plus, then back to iPhone 3GS - found out they switched to unlimited data, and didn't work on my iPhone. I had to call to have them switch back to an iPhone data plan.
Also scary - stuck a dumb phone SIM into my iPhone -automatically added iPhone data plan.
I'm grandfathered into the unlimited iPhone data plan, and don't want to risk it.

naddie said:
- found out they switched to unlimited data, and didn't work on my iPhone. .
Click to expand...
Click to collapse
You can create a custom APN profile and use almost any AT&T SIM in an iPhone. Get on WiFi with your iPhone, and open http://www.unlockit.co.nz/.
My AT&T work SIM is for a blackberry, but I have been using it with my current and prior iPhones with no issues (I have helped a few others in my office do this as well).
I am hoping to be able to do the same with my Galaxy Tab.
Thanks for the link. I will try the modem.bin in a bit- and may even go and do a full-blown AT&T firmware at one point-but I am trying to make sure I have a chance (i.e. the radio frequencies are available) and a way to backout if there are issues.

Broo said:
You can create a custom APN profile and use almost any AT&T SIM in an iPhone. Get on WiFi with your iPhone, and open xxx (unable to post links).
My AT&T work SIM is for a blackberry, but I have been using it with my current and prior iPhones with no issues (I have helped a few others in my office do this as well).
I am hoping to be able to do the same with my Galaxy Tab.
Thanks for the link. I will try the modem.bin in a bit- and may even go and do a full-blown AT&T firmware at one point-but I am trying to make sure I have a chance (i.e. the radio frequencies are available) and a way to backout if there are issues.
Click to expand...
Click to collapse
The thing that scares me is that AT&T actually messes with your plans according to the device you stick your SIM in. Now that's BS, because if I ever want to stick it in another phone to test it out, then put it back in my iPhone, I may loose my unlimited data plan and end up with the 5GB data plan. They don't offer unlimited anymore. I'm grandfathered in.
Before they took it out, I was able to swap devices willy nilly. They were able to switch from plan-t0-plan, and I don't care because I can always get back to the plan I wanted. Not any more!
Let me know how it goes. I'm interested in flashing mine, but not sure how to go about it.

Well, curiosity got the best of me, and I put in my iPhone 4 SIM into the Tmo Tab. It works! Just make sure you have the APN set up correctly. Edge only. I have no idea how to flash the modem.bin file. I'd like to find a way to back up my Tmo modem.bin first before I try the AT&T one.

Nope I've tried *#2263# and changing the apn modem.bin still got edge.

I went ahead and tried a few things- and here is what happened.
I flashed with the EU firmware and the Bell Modem (via the RU firmware and repartitioning) and ended up only getting a GSM signal (wow- that make me nostalgic of my old Nokia 3650 days).
I messed with it for a while and eventually flashed the AT&T stock firmware. With this I was able to get EDGE, but the whole system was buggy- such as the startup screen was blank until it completed and I pressed the power button.
I trief to re-flash with T-Mobile stock firmware and I was stuck in EDGE; no 3G available.
I tried to re-flash with T-Mobile stock again and I totally bricked the unit (note: don't rename the folder containing the firmware while you are in the process of flashing!). It was uber-dead; it wouldn't power on, no recovery mode, connecting to a PC didn't detect any device and the charger wouldn't even light up when I plugged it in.
I ended up returning it to T-Mobile as I had only had it for about a week. They gave me a credit minus a $10 restocking (called post activation) fee. I may look around to see if I can find an AT&T Samsung after the holidays...

Broo said:
I went ahead and tried a few things- and here is what happened.
I flashed with the EU firmware and the Bell Modem (via the RU firmware and repartitioning) and ended up only getting a GSM signal (wow- that make me nostalgic of my old Nokia 3650 days).
I messed with it for a while and eventually flashed the AT&T stock firmware. With this I was able to get EDGE, but the whole system was buggy- such as the startup screen was blank until it completed and I pressed the power button.
I trief to re-flash with T-Mobile stock firmware and I was stuck in EDGE; no 3G available.
I tried to re-flash with T-Mobile stock again and I totally bricked the unit (note: don't rename the folder containing the firmware while you are in the process of flashing!). It was uber-dead; it wouldn't power on, no recovery mode, connecting to a PC didn't detect any device and the charger wouldn't even light up when I plugged it in.
I ended up returning it to T-Mobile as I had only had it for about a week. They gave me a credit minus a $10 restocking (called post activation) fee. I may look around to see if I can find an AT&T Samsung after the holidays...
Click to expand...
Click to collapse
Ouch! yea, you wouldn't want to change the name of the folder you're flashing from. >_<
For those who flashed their Tmo Tabs wth the AT&T modem.bin file and still getting only Edge, did you make sure you're set to connect to GSM and WCDMA?
When I inserted my Tmo SIM back in after playing around with AT&T, I also had Edge only. I found out that I left it on GSM only. Doh! Set it back to GSM and WCDMA, and I got my 3G back.
I'm hoping that's the small detail that is preventing Tmo Tab users who flashed to the AT&T modem.bin.
I still haven't found the instructions to flash the modem.bin though. All the guides I found are about flashing entire ROMs with the modem.bin, not just the modem.bin itself with the stock (but rooted) Tmo ROM. Otherwise, I'd try it myself. Also would like to know how to back up my current modem.bin before I start experimenting.
On a positive note, AT&T hasn't messed with my granfathered unlimited iPhone data plan yet. *cross fingers* Makes me feel more confident to try it again on my Tmo Tab.

Has anyone succeeded in getting both data and voice? I have an iphone unlimited data plan and a t-mo tab.

Where are you guys getting the ATT rom from and what .pit file are you using.
I am trying to go back to the ATT rom but it boots blank after trying a couple posted here.
Thanks

I too have a tmobile SGT and I would very much like to use it on at&t 3g. I have sadly yet to have found a definitive answer as to whether or not the hardware is capable of doing so? Shouldn't it be a simple matter of flashing the at&t modem.bin onto the tab so that it can handle the appropriate 3g frequencies?
please advise!

Definitely NO. Hardware is not compatable. There are many definite answers, and a few idiots. The radio frequencies don't match, and no rom or modem file can change that.

[Q] Why isn’t sim card being recognized?

Hey all, I’m having problems with my sim card not working, my Captivate doesn’t recognize it at all. I got this captivate to hold on to from my older brother who is currently serving overseas (not possible for him to use phone) a few months ago. When I got it, I rooted it, sim unlocked it (I have t-mobile), and got to flash roms and have fun with it thanks to you good folks on these forums.
About 2 weeks ago, the speaker was issues that really bothered me(had to keep tapping it in to get It to work) so I decided to send it over to Samsung to fix. The phone was still under warranty, so it cost nothing to fix fortunately. I just got it back yesterday, and since then my t-mobile sim card would not work. I rooted, sim unlocked, and flashed many different roms and still not working. Its as if the phone thinks there is no sim card at all (“No SIM Card Emergency Calls Only”). I also tried this app called Samservmode, and enabled all bands (GSM/WCDMA) to see if it would work; it didn’t.
I was ready to call Samsung again, but when I went over to my friend’s house and tried his att sim card; it worked perfectly and I was able to send texts and make calls. So something must be wrong with my sim card, it works perfectly on my g1 though (my backup phone that was used while Captivate was away). I was able to use the same t-mobile sim for a few months in a row before I sent it to Samsung, isn’t this possible for me to do it again? Any advice on doing so would be much appreciated; thanks.
P.S. My t-mobile sim card is prepaid if that matters, so I don’t use 3g or edge or any data networks.
Also my current setup (if it even helps, I've been flashing between froyo and ginger nonstop trying to fix this issue)
Firmware: 2.2
Baseband: I897UCKB1
Kernel: 2.6.32.9
Phone number and network is unknown
Mobile network type: HSDPA
Service state: Out of service
Roaming: Not roaming
Mobile network state: Disconnected
Everything else works pretty fine on this phone (wifi, bluetooth, etc.)

UPDATE: I went back to my friend's place and with his att sim card in, I tried adding a t-mobile APN based on
http://forum.xda-developers.com/showthread.php?t=744535
Unfortunately this did not resolve the issue. I did this with his att sim card because when there is no sim (or in my case, my tmobile sim) in the phone, you can't access mobile networks in settings.
I am also currently on stock I897UCKH3

UPDATE 2: So I just tried my other friends t-mobile sim card (that is on a plan) and the captivate had service; was able to make calls and text. My prepaid sim card seems to be the culprit here. I don't understand because as I tested my friends sim card on the captivate, I also put my sim card in his iphone 3gs (unlocked) and it worked fine there. Is the captivate on strike against my sim card or something? I'm going to try calling t-mobile tomorrow (doubt they'll help since the captivate isn't their phone) and see if anything can be done. In the meantime if you guys have any advice, I'm all ears.

UPDATE 3 (This is getting kind of annoying): I just got off the phone with both Samsung and T-mobile and both of them don't know what to think. I'm beginning to think this is a special case and this problem only occurred to a very few amount of people. If anyone can help with suggestions I would be very grateful. I'm thinking about going to a t-mobile store today to see what they think, maybe seeing the issue in person would help in their perspective.

Doubt anyone is going to answer or even post, but here goes:
BUMP
I also went back to stock and followed this guide:
http://forum.xda-developers.com/showthread.php?t=881162
with no success.

You try getting a new sim card?
Sent from my I897 using xda premium

Does T-Mobile have any policy of replacing prepaid sim cards? If so, that sounds like your best option. Also, Samsung might have been angry at you cheating their system, and purposefully disabled your sim card. Make sure you take out your sim before sending it back for repair.

Thanks for the reply guys, much appreciated. I decided to just live with it and keep the captivate as a galaxy s wifi if you will for media purposes only like an ipod touch. My g1 will be a phone. Once the nexus prime comes out I will start up a contract and finally experience 4g speeds and w/e else I can get with a contract thats not available on prepaid.
Also I did not send Samsung the phone with the sim card in, idk how they must've known to block it. Thanks again.

No tablet plan / Bell Blocking Voice via IMEI?

Hi there. I've searched around and couldn't find an answer, so if this is already posted please point me in that direction.
I'm about to purchase an unlocked Galaxy Tab originally from the Rogers network off of a friend. I'm with Bell. I'm one of the lucky few that have the unlimited data plan originally offered with the Palm Pre, that also works with Android.
My question is if Bell will realize that I don't have a tablet plan when I do the steps in order to make calls/sms working and block my device or change my plan. Does anyone have a voice plan that they've been able to use with Bell on the Galaxy Tab without them noticing? This is more of a precautionary for me, because I'd really like to keep my data plan and would be quite upset if Bell were to change it.
My reasoning for getting a Rogers Tab unlocked is my assumption that Bell won't have the IMEI for a device they don't sell, so it may be safer for me. Thoughts?

i would like to know as well. im in the proccess of doing same
Sent from my GT-P1000R using XDA App

I use my Galaxy Tab as my primary / only device, which includes phone calls on Bell Mobility. I used to have Blackberry on a voice and data plan, and when I got the Tab and realized I wanted nothing else / rooted / flashed a useful ROM that supports voice, all I did was plug the new SIM into the Tab.
I haven't had any problems or changes made by Bell. I doubt they can see my device, or care, as I have called for misc reasons from the device. I simply never told them of the device change.
Now, my plan prior to the device change supported voice and data. So if your current plan does that I think you'll be ok.