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[Q] Unable to use 3G on unlocked HTC Desire

Hi,
I am unable to use 3G on htc desire. I have set the correct APN. The problem is that when I choose "WCDMA" as the network mode, it automatically switches back to "GSM only". The place where I live has no problem with 3G availability. I feel the problem lies more with my handset. Can someone please help ? Is there anything that I can do to get rid of this problem. My phone has lost its warranty since I unlocked it.

Have you tried any other operator sim card? It's a good troubleshooting to do when this kind of problems happen...
Had problems like that before and it was an incorrect APN setup.

Thanks for getting back. I tried with a different sim and a different operator. They were also not successful. APN setting is perfectly right for the current sim. The APN settings were given by the operator.

rkk1 said:
Thanks for getting back. I tried with a different sim and a different operator. They were also not successful. APN setting is perfectly right for the current sim. The APN settings were given by the operator.
Click to expand...
Click to collapse
Are you using any kind of widget to switch APN on / off, 2G/3g ?... I noticed that for example, Widgetsoid can mess with 3g connection so much that sometimes you need to remove it and reboot the phone so you can get things working again.
Try using another SIM card too. It may give you a clue on what's going on: wrong settings / card with no data activated / etc ...

I am not using any widget to turn on/off the 3g. EDGE services work on my mobile while 3G is not working. If I use the sim card on to a different mobile, 3G works fine without any problem. Tried using another sim card with 3G data activated and that also did not work fine for me on HTC Desire.

[Q] How do I prevent Samsung Galaxy S 4G from connecting to AT&T?

I have Samsung Galaxy S 4G with T-Mobile in San Francisco.
Whenever I go to an area without T-Mobile signal, the phone connects to AT&T. I called T-Mobile and they said that's because T-Mobile has roaming agreement with AT&T so my phone would connect.
The problem is, when my phone connects to AT&T, I can't make any calls. It says the phone's not registered. T-mobile says that's because I'm in an area that has T-Mobile coverage.
You'd think that the phone would be smart enough to figure out that only emergency calls can be made (which is what BlackBerry does and shows SOS sign). The real problem for me is that, I have WiFi calling enabled with cellular preference, and when I'm in the basement of my office building where there is no T-Mobile signal (but there is WiFi signal), my phone thinks it has cellular signal so it doesn't activate WiFi calling, yet no phone calls are coming in b/c it's not registered to AT&T's cellular network.
Is there a way for me to force my phone to only connect to T-Mobile? I know there isn't on the regular settings menu, but perhaps experts could tell me how to do so using those star-sharp keys listed here (http://forum.xda-developers.com/showthread.php?t=842134)?
Thank you!

Set wifi preferred instead of cellular.
Sent from my SGH-T959V using XDA App

Unfortunately, that doesn't work for me because I move around a lot, and Android WiFi calling feature doesn't have handover.
There's got to be a way to prevent this phone from connecting to AT&T at a low level somehow, no?

How do I do that? Have checked the manual but can't find location where explains how to select wi-fi preferred instead of cellular. Your kind advise will be appreciated

Open WiFi Calling and select settings. You'll see Preference. Select Cellular Preferred.

I think in setting then wireless and network, then mobile networks then network operators click the default settings.... select manual and wait for the carrier to pop up.
Will this solve your problem?
Sent from my SGH-T959V using XDA App

scoop_dtx said:
I think in setting then wireless and network, then mobile networks then network operators click the default settings.... select manual and wait for the carrier to pop up.
Will this solve your problem?
Sent from my SGH-T959V using XDA App
Click to expand...
Click to collapse
yep manual is exactly what OP should do.

if the settings for network operators are set to manual then u select the network u want and it sticks unless u manually select a different network provider. u are in select automatically mode so the phone can switch all on its own. this should solve your problem as other people have already mentioned

I have tried this many times and works as long you don't turn the phone off. After I forced the phone to manually select T-Mobile I checked many times the default setting and it remained in manual until the phone was turned off. When I switched it back on it was again in automatic mode and switching to ATT when signal is low.
Is there a way to prevent this? If not, well , first thing when phone is on in the morning is to check default setting.
5/24 I finally gave up and sold the phone. Samsung says they have not received any claims regarding this issue eventhough you see it frequently in the forums. I returned back to my HTC HD2 and will wait for the G2.

Mytouch 4G, will not connect to tmobile network

Ive got an mytouch 4g will not connect to any network, the person I got it from had it rooted to 2.3.3 but did not install the new radio, I installed the GB radio but it still wont connect, any ideas???

astang99 said:
Ive got an mytouch 4g will not connect to any network, the person I got it from had it rooted to 2.3.3 but did not install the new radio, I installed the GB radio but it still wont connect, any ideas???
Click to expand...
Click to collapse
Bad SIM card.

no, tried 3 different sim cards, all the same response, 2 different mytouch 4G's with the same problem, only says limited service

I had a very odd issue similar to this after trying some different roms and then using CWM to restore my RG rom...
In short, I was only able to get service via wifi calling and while in my 'home' area. As soon as i left my home, I would loose all service while others maintained service just fine. If i didn't know any better, it would seem that my phone was locked to a specific tower.
It took a factory reset on the rom before I could get any service back while outside of my home market.

that almost sounds like the same issue, I can get wifi with no problem, just will not let me get service any other way, when I try to select tmobile from network selection it says your sim card will not let you get service

shot in the dark, but... did you check your apn settings???

how do I check apn settings?

astang99 said:
that almost sounds like the same issue, I can get wifi with no problem, just will not let me get service any other way, when I try to select tmobile from network selection it says your sim card will not let you get service
Click to expand...
Click to collapse
I would grab a fresh rom, factory reset the device, flash the rom and reflash the radio. At this point, if you don't do so regularly, MD5 check what you download to ensure its as it should be.
If we go with the 'locked to a tower' assumption, when this happened to me, it appeared 'locked' to the tower it first connected to upon reboot. If you are not in that area now, it prob wouldn't connect.
Also, i have had nothing but problems when I attempted to apply the APN settings listed in forum posts. Just default them, see if it helps..
Settings> Wireless & Network> Mobile Networks> APN Settings > menu button, reset to default. But i think this only affects mms, internet and not the connection to the mobile network itself.
**edit**
I also received an error when attempting to manually connect or search to a mobile network.

factory reset, from cwm?

Yes. Once completed, i went ahead and reflashed the rom while still in CWM.

any other ideas if this doesnt work?

lol, brick it and call tmobile.. "its stuck in a bootloop"

another thought is to call tmobile and ask them essentially if they can reset your device in the towers. I worked for them (voicestream) like 12 years ago, the lingo has most likely changed but there maybe something in the system that is causing the problem..
I was able to see the problem go away once i factory reset, so I didn't bother. Just don't mention anything that could be noted as 'warranty voided'..
Typically, when I call, i give them just enough information to get them to do exactly what I want. They shouldn't care that you run a custom rom and they don't need to know.. just the fact that you cannot connect to the network should be information enough.

T-Mobile US APN Settings: (By Elvis_Freshly)
Click on Menu
Click on Settings
Click on Wireless & networks
Click on Mobile networks
Click on Access Point Network
You will see a tab with Some provider settings,if rooted device with custom ROM.
Ignore it for now.
Click on Menu
Select New APN from popup menu.
You will see a window come up with a bunch of tabs.
Clcik on name and Name the connection as T-Mobile USA
Click on APN and enter epc.tmobile.com
Click on Proxy and enter 216.155.165.50
Click on Port and enter 8080
Username will show as (leave it alone do not touch)
Password will show as (leave it alone do not touch)
Server will show as (leave it alone do not touch)
Click on MMSC and type in http://mms.msg.eng.t-mobile.com/mms/wapenc
Click on MMS proxy and type 216.155.165.50
Click on MMS port and type 8080
MMS Protocol should be WAP 2.0 if not then click on tab and select WAP 2.0
MCC should be set to 310 if not click on tab and set it to 310
MNC should be set to 260 if not clcik on it and set to 260
Click on Authentication type and select None
Click on APN type and enter default,supl,mms
And then Click on menu and save it.
Now you go back and you will see a T-Mobile US Apn that we just created.
Select that and a red circle should appear next to the Tab.
Now press back twice to go to Wireless & Networks screen
Uncheck Mobile network tab and wait for a few secs;
Check the Mobile networks tab again;
Now reset your phone and enjoy T-Mobile data, MMS and SMS
Click to expand...
Click to collapse
Sorry about the copy and paste but this seemed to be the one exception to the case, I would take a little time to look threw some of the rom settings. If this doesn't work send the phone back, it seems to me that's the last thing you want to do but if this doesn't work then you may have no choice but to and why waste more time.

i doubt this issue has anything to do with the apn settings as those only affect T-Mobile data, MMS and SMS. Even if they were completely wrong, the phone would still make a connection to the network for voice services.

When I got my mt4g with new simcard, I have to call tmo to reigster it.
Or perhaps the phone is simcard locked.
Sent from my HTC Glacier using Tapatalk

inst1029 said:
When I got my mt4g with new simcard, I have to call tmo to reigster it.
Or perhaps the phone is simcard locked.
Sent from my HTC Glacier using Tapatalk
Click to expand...
Click to collapse
That's true, I had to do the same, I had a Blackberry prior to the MT4G and had to call and give them my IMEI and other info in order for them to activate my service, I got mine out right not through T-Mobile. I had to agree to the terms over the phone with CSR before I could do anything other than make calls.
Still I would think if he got the phone through T-Mobile and had the SIM sent with it as security goes you would still have to call in to verify you got the phone and call in the IMEI to be activated for that account.

Orical said:
That's true, I had to do the same, I had a Blackberry prior to the MT4G and had to call and give them my IMEI and other info in order for them to activate my service, I got mine out right not through T-Mobile. I had to agree to the terms over the phone with CSR before I could do anything other than make calls.
Still I would think if he got the phone through T-Mobile and had the SIM sent with it as security goes you would still have to call in to verify you got the phone and call in the IMEI to be activated for that account.
Click to expand...
Click to collapse
See, this is the difference. You were able to connect to tmobiles network. OP is unable to get that far. There is no service, and even manually attempting to select a network resulted in an error.
Sent from my HTC Glacier using XDA App

The phone could be imei blockd. T-Mobile will do that if its lost or stolen. Or if the person who got it said he never got the package and they sent a new one. I kno this cuz my brother ripped of T-Mobile by sayin he didn't get a replacement and they blocked the one he said he didn't get. Try unlocking it and using a att sim
Sent from my HTC Glacier using XDA App

urmothersluvr said:
The phone could be imei blockd. T-Mobile will do that if its lost or stolen. Or if the person who got it said he never got the package and they sent a new one. I kno this cuz my brother ripped of T-Mobile by sayin he didn't get a replacement and they blocked the one he said he didn't get. Try unlocking it and using a att sim
Sent from my HTC Glacier using XDA App
Click to expand...
Click to collapse
Boned..
Sent from my HTC Glacier using XDA App

[Q] how to select network operator manually?

i am using AT&T's Samsung galaxy s2 skyrocket (unlocked), i am unable to select a network operator manually. As i keep going around different countries, i keep on purchasing local sim cards for calling home, so i need to select the network manually, otherwise it will select the network which has best signal strength and i may land up paying heavy charges for roaming.
when i go to wireless and network/ mobile networks/ network operators only thing which comes written is "DEFAULT SETUP" and that is greyed out. (when i tap on nothing happens).
also when i change back to my old AT&T sim, i am able to access that greyed out area, but when i put another sim "DEFAULT SETUP" is again inaccessible.
can someone please guide me through it..??

Are you using the stock ROM?
Sent from my SGH-T989 using Tapatalk

I have bought the phone just a weak ago... i have changed nothing except for SIM card....
actually i dont know any thing about ROMs and i m new to android also... i just guess that above written satisfies your question.

well thats your answer. You can not do that on stock att firmware

what modifications i have to do .... to achieve the desired results...??
and please tell HOW to do also....!!

You need to flush custom ROM that supports changing network operator settings.
Look at this post if you would like to use custom ROM:
http://forum.xda-developers.com/showthread.php?t=1383464

Problem with Skyrocket in india

Hi,
I have a galaxy skyrocket i727 from AT&T with last Gingerbread firmware(2.3.6 from at&t).Now i am in india.Recently i did a factory reset and now i have lost data connectivity(though i get full signal and can do calls or messages).
Even before i used to select frequency bands manually to swap between 2g-3g by dialling *#*#197328640#*#* and i used to get data fine.As there is no such option of selecting 'gsm only' or "wcdma preffered/gsm" in wireless&networks menu of the AT&T Firmware.
So the main question is if i put the unofficial ICS ROM like AOKP or UCALC4 than will i get this 2G to 3G selection in settings?Will the phone select indian frequency bands automatically?
thanks!

You may have lost your apn and that's why you can't get data, check under settings mobile network apn if there is anything there(I think that's how it goes in GB) if there isn't check your provider's site or call them and ask how you should configure it.
About your second question, it depends on what rom you will flash, some support it and some don't.

kishke said:
You may have lost your apn and that's why you can't get data, check under settings mobile network apn if there is anything there(I think that's how it goes in GB) if there isn't check your provider's site or call them and ask how you should configure it.
About your second question, it depends on what rom you will flash, some support it and some don't.
Click to expand...
Click to collapse
Thanks for replying!
My APN is ok.I requested new apn after deleting older ones and even did a manual "Add new apn" perfectly.Thats why i am asking this question ,because there is no reason for getting "no data".Everything is perfect except that there is no "E" or "H" symbol with up-down arrows beside the network strength bars!

Stupid question but did you enable data?

kishke said:
Stupid question but did you enable data?
Click to expand...
Click to collapse
yeah dude!Obviously!
enabled - disabled it several times!rebooted after selecting apn etc etc But no good

Well sometimes we ignore the obvious so I had to ask. Check your apn again to be sure, make sure the internet apn and not mms apn is checked if you have 2, and it's defined as internet or internet+mms in case of one combined apn.
If this wont fix it something must have happened in the factory reset and you should try upgrading to ICS and see if it still works.

Hey.. BTW I have a question for you , how did you unlock your phone yo use it in India ? I know there are unlock codes, just curious if you got it from at&t or you had to go the eBay way ?
Sent from my SAMSUNG-SGH-I727 using xda app-developers app

gravi2 said:
Hey.. BTW I have a question for you , how did you unlock your phone yo use it in India ? I know there are unlock codes, just curious if you got it from at&t or you had to go the eBay way ?
Sent from my SAMSUNG-SGH-I727 using xda app-developers app
Click to expand...
Click to collapse
unlocked via z3x box....a tool used by unlockers.Had a friend of mine who owned it.It unlocks all samsungs for free!!

- You need to be SIM Unlocked and have a RAT Unlocked Radio (HINT: Roger I-727R radios)
and
- You need a ROM to support those, if you using TouchWiz I have supported this always from the beg. im my
ROM (see my sig.)
And I do travel there once a quarter, no issues for me. I have an IDEA Card and it works perfect, even ROAMING to 3G where IDEA piggy backs on other providers..

mohan_kr said:
- You need to be SIM Unlocked and have a RAT Unlocked Radio (HINT: Roger I-727R radios)
and
- You need a ROM to support those, if you using TouchWiz I have supported this always from the beg. im my
ROM (see my sig.)
And I do travel there once a quarter, no issues for me. I have an IDEA Card and it works perfect, even ROAMING to 3G where IDEA piggy backs on other providers..
Click to expand...
Click to collapse
when i initially read your name ,i guessed you were indian!
Thanks for the reply.I just flashed the sk8erwitskil,s Latest Cyanogenmod 9 with UCLF6 libs just to check if i was able to switch radios,but right now i am in "2G/gsm only" area.Data is working fine,but cannot turn on wifi...it keeps saying "turning on".
My phone is sure sim-unlocked on idea network,and on UCLF6 Modem(is this thing same as a "radio"?).Initially i was on stock at&t GB firmware.Btw ,which place in india do u travel?
If wifi error persists i will flash EMBRYO Rom