Develop Bugs

[Q[[Galaxy Nexus GSM] Why does it change to gprs or edge during a call?

Hi folks, I have a GSM Galaxy Nexus running Android Jelly Bean (4.1.1). Since I bought it, with ICS, and even now it has had the same problem: whenever I start a call or answer one, it immediately changes to 2g (I checked on settings, sometimes it's gprs, sometimes EDGE, but always 2g). This results in poor call quality and in several cases, dropped calls. When I'm not on a call, the 3G works fine and fast.
I checked this forum and didn't find any question regarding this matter, does any one has the same issue or it's just my phone? Is it a bug or is it meant to be this way?
Thanks,

Definitely not meant to work that way. I'd talk to your carrier. Might be a network or SIM problem.

Thanks, apparently my carrier (Personal Argentina) doesn't have a clue why this is happening. I'm gonna change sims and update if there are any changes
Sent from my Galaxy Nexus using xda app-developers app

It was the SIM card, I changed it and now it works fine. Thanks :good:

mbq said:
It was the SIM card, I changed it and now it works fine. Thanks :good:
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Click to collapse
No problem. Glad you fixed it.

Ive got this too
Sent from my Galaxy Nexus using xda premium

Try asking your carrier for another sim, it did the trick for me.. Before doing that, try asking a friend another sim to check if that's actually the problem
Sent from my Galaxy Nexus using xda app-developers app

[Q] Sim Problem

Hello . I have a big problem with my Samsung Galaxy Nexus ..
Yesterday i was using my phone normal .. as usual and after a cuple of messages and phone calls i put it in my pocket .
i cecked it after a cuple of hours and my sim wasn't working.
i was using stock rom JB4.2.2.
i mention that only one carrier sim card's doesn't work .. if i put another sim from another carrier it work's normaly ..
did anyone had this problem before?
please help me.
sorry for my english/I'm from romania. !

I dont think anyone here can help you. It sounds like an issue with the card itself. Sounds like you should replace it.

jsgraphicart said:
I dont think anyone here can help you. It sounds like an issue with the card itself. Sounds like you should replace it.
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well i tried another sim card same carrier as mine .. it doesn't get any signal .!
sorry for my english/ I'm from romania.

daniio94 said:
well i tried another sim card same carrier as mine .. it doesn't get any signal .!
sorry for my english/ I'm from romania.
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Click to collapse
If that's the case then I don't know. I'm on a carrier specific phone so I can't switch between multiple carriers. I'm not familiar with that. My understanding on that was that you just put the Sim in and you're good to go. I don't know of you have to activate anything. Maybe it just takes a little bit to actually get the signal. Have you switched them out before without issues?

jsgraphicart said:
If that's the case then I don't know. I'm on a carrier specific phone so I can't switch between multiple carriers. I'm not familiar with that. My understanding on that was that you just put the Sim in and you're good to go. I don't know of you have to activate anything. Maybe it just takes a little bit to actually get the signal. Have you switched them out before without issues?
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Click to collapse
yes i did .. and it worked but...
and that sim card right now in it and it's like 12 hours and yet no signal .. and i don;t tink its a region problem because my friends on cosmote are having signal .

Did you get the iPhone new or used? Could it have Been blacklisted by the specific carrier?
Sent from my Galaxy Nexus using xda app-developers app

gagb1967 said:
Did you get the iPhone new or used? Could it have Been blacklisted by the specific carrier?
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
i don't have iphone and .. it was new,, anyway,,

Its hard to say what the issue could be. I would get a hold of the carrier.

Downgrade radio version?
Sent from my Nexus

bk201doesntexist said:
Downgrade radio version?
Sent from my Nexus
Click to expand...
Click to collapse
don't know how. i only know how to downgrade version of my android with .. galaxy nexus toolkit .!

I meant phone. Sorry about that.
Sent from my Galaxy Nexus using xda app-developers app

No service

My girlfriend bought a gs4 recently and it was working fine till today. She lost T-Mobile service. There is no signal it just says unable to connect. WiFi works fine but it won't connect to T-Mobile network for some reason. So she can't make calls or text. We reset it a few times, took the SIM card out and put it in my phone. And her SIM works on my phone. So it's the gs4, we tried doing almost everything
Anyone else have this issue?
Sent from my HTC One using xda app-developers app

try going to a t mobile corporate store near you and tell them that you would like to exchange your S4. or try calling them (dial 611 from your t mobile phone)

re: airplane mode.
mingsterlbc said:
My girlfriend bought a gs4 recently and it was working fine till today. She lost T-Mobile service. There is no signal it just says unable to connect. WiFi works fine but it won't connect to T-Mobile network for some reason. So she can't make calls or text. We reset it a few times, took the SIM card out and put it in my phone. And her SIM works on my phone. So it's the gs4, we tried doing almost everything
Anyone else have this issue?
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
make sure that the phone is not in "airplane mode".
When you pull down the nofication screen slide the
toggles left and right til you see "airplane mode"
and be sure it's not lit up.
Good luck!

She said she took it to tmobile but they said they can't fix it and can't do nothing about it. As for airplane mode it's not in it. It's weird it would automatically turn of the enable data connection when check it on and try to connect to tmobile network it can't connect and it uncheck the box automatically
Sent from my HTC One using xda app-developers app

mingsterlbc said:
She said she took it to tmobile but they said they can't fix it and can't do nothing about it. As for airplane mode it's not in it. It's weird it would automatically turn of the enable data connection when check it on and try to connect to tmobile network it can't connect and it uncheck the box automatically
Sent from my HTC One using xda app-developers app
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Click to collapse
Did she get the phone from T-Mobile?
Sent from my C6603 using XDA Premium HD app

Sounds like it might be blacklisted , where was the phone bought?
Sent from my SGH-M919 using Tapatalk 4 Beta

she bought it off craigslist, it worked fine for a week or two. now its no service at all.

mingsterlbc said:
she bought it off craigslist, it worked fine for a week or two. now its no service at all.
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Click to collapse
If you got it from craigslist your probably SOL. Sorry dude i would try reflashing radios just to make sure but that's about all you can do.

mike105217 said:
If you got it from craigslist your probably SOL. Sorry dude i would try reflashing radios just to make sure but that's about all you can do.
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Click to collapse
what does SOL means?

mingsterlbc said:
what does SOL means?
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Sorry out of Luck

mike105217 said:
Sorry out of Luck
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yeah i will probably try to reflash radios. is there root and all that already out havent really checked on it.

mingsterlbc said:
yeah i will probably try to reflash radios. is there root and all that already out havent really checked on it.
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Click to collapse
The day it came out.

[Q] Is this blocked IMEI on my Note 2? im confused :(

Im a little confused and im wondering if someone can help me out or if someone is going through the same thing i am.... :crying::crying::crying:
So i just got a Galaxy Note 2 from my fathers friend at work and i am wondering is this considered when they say being a blocked IMEI cause its a little confusing...
So I have T-Mobile and i received the Note 2 it is not rooted or anything and the IMEI matches the same in the "About Device" and in the back behind the battery so anyways i go and pop my micro sim card in and notice right away it gets no service it just has a circle with a horizontal line accross like seen on the pics and the lock screen just says "Searching".. i go into mobile networks and try to manually select the T-mobile network and it just gets stuck on "Registering to T-Mobile" then i get an error in my notifications that says "No Service Selected Network (T-Mobile) not available" so right away im assuming that the IMEI must be bad so i call T-Mobile give them the IMEI and they tell me its NOT blocked so now it gets confusing.
while i was still messing with it i decided to turn ON wi-fi and all of a sudden the wi-fi calling feature turns on and viola! the circle with the horizontal line changes to empty service bars and in the notifications dropdown it now says T-Mobile so i go on and make a call IT WORKS! send a text IT WORKS receive calls and texts ALSO WORK! now isnt that wierd?
what do you guys think might be wrong with the phone is the IMEI really blocked but if it is will i be able to make calls and send and receive texts i dont understand please some one help me any advice will be appreciated.. :fingers-crossed:
Thanks (here are pics of screen shots)

Try switching the phone to 2g only ! *#*#4636#*#*.
MIGHT BE signal problem in your area
Sent from my iPad using Tapatalk HD

I actually tried that and it dont work..... but now something wierd happened... it start working good In certain areas and then it cuts off
Sent from my SGH-T889 using xda premium

Try calling tmobile with a differnt phone.
Sent from my SGH-T889 using xda app-developers app

Generally, when your IMEI is blocked, you'll have bars and even data. Your phone just won't work. So I doubt it's that. The fact that WiFi calling works tells me that the SIM reader works. Do you know if the phone was taken apart? Maybe the antenna is messed up. Id just try going somewhere else to use your phone and try.
Possibly root and flash different modem?
Sent from my SGH-T889 using xda app-developers app

You_got_owned123 said:
Generally, when your IMEI is blocked, you'll have bars and even data. Your phone just won't work. So I doubt it's that. The fact that WiFi calling works tells me that the SIM reader works. Do you know if the phone was taken apart? Maybe the antenna is messed up. Id just try going somewhere else to use your phone and try.
Possibly root and flash different modem?
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
The sim card reader does work cause sometimes out of the blues the phone will register on the network and im able to use it fully as it should and then it goes back to having the little circle with a line accross it.... today it behaved preety good it gave me a good amount of time of usage but it would still randomly cut off and come back on..... as far as being opened im starting to think it maybe was opened or something cause it doesnt have the "VOID" sticker on the screw in the back like it should..... and maybe what u said about flashing a different modem how can I check what modem I have now?? Cause the phone was rooted and had a custom rom but I restored it back to stock with Odin not sure if doing that will restore the stock modem or not.
Thanks for all your help :thumbup:
Sent from my SGH-T889 using xda premium

DROID_ROCKS_IFONE said:
The sim card reader does work cause sometimes out of the blues the phone will register on the network and im able to use it fully as it should and then it goes back to having the little circle with a line accross it.... today it behaved preety good it gave me a good amount of time of usage but it would still randomly cut off and come back on..... as far as being opened im starting to think it maybe was opened or something cause it doesnt have the "VOID" sticker on the screw in the back like it should..... and maybe what u said about flashing a different modem how can I check what modem I have now?? Cause the phone was rooted and had a custom rom but I restored it back to stock with Odin not sure if doing that will restore the stock modem or not.
Thanks for all your help :thumbup:
Sent from my SGH-T889 using xda premium
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Click to collapse
I don't think there actually is a void sticker.. When I opened mine up, I didn't find one . I could have just over looked it possibly. Just try flashing JediM14. Comes with everything you need much better than stock. I'm thinking maybe tmobile is working on your area so you have intermittent service. Could be anything. I'll try to help you look into it. The sticky for the modem, ,facotry img and such is in android development. I think the sticky thread is in top three. It's obvious
Sent from my SGH-T889 using xda app-developers app

When you odin flashed back to stock did you then run all available ota's?
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moto211 said:
When you odin flashed back to stock did you then run all available ota's?
Sent from my SGH-T889 using xda premium
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Click to collapse
Yea I tried that and it said there was no available updates.... im currently running build JZO54K.T889UVBMB4 is that the latest one??
Sent from my SGH-T889 using xda premium

You_got_owned123 said:
Just try flashing JediM14. Comes with everything you need much better than stock. I'm thinking maybe tmobile is working on your area so you have intermittent service. Could be anything. I'll try to help you look into it. The sticky for the modem, ,facotry img and such is in android development.
Click to expand...
Click to collapse
Does that rom JediM14 flash a different modem when I flash it..... and ive heard about the canadian T889v modem will that work on my phone? Excuse the noob question im not that experienced in this so dont wanna brick my phone or anything
Sent from my SGH-T889 using xda premium

DROID_ROCKS_IFONE said:
Does that rom JediM14 flash a different modem when I flash it..... and ive heard about the canadian T889v modem will that work on my phone? Excuse the noob question im not that experienced in this so dont wanna brick my phone or anything
Sent from my SGH-T889 using xda premium
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Click to collapse
im having same issue but i can actually make calls and get text, the data side isnt working , sometimes it kicks in but its more on no data than on
im calling for a replacement tomorrow this was a replacement from a bad usb port phone i sent 2 days ago , tried everything and i know its not network cuz everyone in my house has t mobile . hope you figure it out as i gave up

JediM14 comes with the new MD1 firmware. Everything is for Tmobile. During installation, I think aroma gives you options for modem..not completely sure . but if you have tmobile, I'd stick with tmobile modem. Does anyone else have tmobile at your house you can compare signal to?
Sent from my SGH-T889 using xda app-developers app

JediM14 comes with the new MD1 firmware. Everything is for Tmobile. During installation, I think aroma gives you options for modem..not completely sure . but if you have tmobile, I'd stick with tmobile modem. Does anyone else have tmobile at your house you can compare signal to?
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
I actually just updated to the OTA MD1 update and still the same and my wife has T-Mobile aswell she has an iphone 5 and she never looses service here, not too mention we get LTE already in our area but she always has full or almost full bars, as for me as im typing this now this is what mines looks like but yet yesterday in the night I was getting service and 4g LTE
Im starting to think maybe its a hardware problem with my cellular antenna cause my wi-fi antenna works just perfect or what else might it be?
Sent from my SGH-T889 using xda premium

As long as you're stock and unrooted, you might be able to get a warranty replacement. I know you're not the original owner but it really depends on the rep that you get on the phone. If you get the right rep they'll warranty it based on the fact that no matter who originally purchased the phone, there's no way it could be more than a year old. Or, if you have the premium handset protection, you should be able to get it covered under the extended warranty that it offers.
Sent from my SGH-T889 using xda premium

Call Tmobile and tell them your situation. They'll reset your connection to the towers and it might help. They've done that for me. Just ask for like a connection reset. Even better if you just told them what's happening.
Sent from my SGH-T889 using xda app-developers app

Could be antena problem. Had that happen to me with my skyrocket. The one end was not connecting to the right place. Somebody accidentally cut it off when I had the speaker fixed.

droidbabyxda said:
Could be antena problem. Had that happen to me with my skyrocket. The one end was not connecting to the right place. Somebody accidentally cut it off when I had the speaker fixed.
Click to expand...
Click to collapse
Could be this. I bought a replacement loudspeaker that was apparently for the T889 (which it wasn't)..[Most loudspeaker modules that say they are for the T889 are missing the third contact.] It was a missing a antenna contact which totally killed my reception. Try to take it apart and look at the loudspeaker. There should be three white tab looking things on the module itself. If there's only two, then that's most likely the problem.

Insert Sim error after inserting the sim

Hello guys.. how are you? I am new on this forum.. I have a problem with my Galaxy s4. When I insert the sim, after that it again demands for the sim. I don't know how to solve this problem. White signals are present near the battery but I am unable to use the service of sms and calls. Any solution related to this problem will be appreciated. Thanks!

waqarimran said:
Hello guys.. how are you? I am new on this forum.. I have a problem with my Galaxy s4. When I insert the sim, after that it again demands for the sim. I don't know how to solve this problem. White signals are present near the battery but I am unable to use the service of sms and calls. Any solution related to this problem will be appreciated. Thanks!
Click to expand...
Click to collapse
The SIM itself could be bad.
Have you tried going to T Mobile and getting a replacement SIM?
Do you know anyone else with a T Mobile phone who could lend you their SIM for 2 minutes to test it? If you get the same results with another SIM the phone is the problem. If you don't, the SIM card itself is the problem.
Are you rooted? What ROM are you running?
If it's the stock unrooted ROM I'd say don't mess with it yourself. Go right to a T Mobile store and tell them to give you a new SIM.

I second that. I would also check to see if the SIM is in backwards. Someone may have just cut the micro SIM wrong as well. Good luck. :thumbup:
Sent from my SGH-M919 using xda app-developers app

Skipjacks said:
The SIM itself could be bad.
Have you tried going to T Mobile and getting a replacement SIM?
Do you know anyone else with a T Mobile phone who could lend you their SIM for 2 minutes to test it? If you get the same results with another SIM the phone is the problem. If you don't, the SIM card itself is the problem.
Are you rooted? What ROM are you running?
If it's the stock unrooted ROM I'd say don't mess with it yourself. Go right to a T Mobile store and tell them to give you a new SIM.
Click to expand...
Click to collapse
I have tried all the other sims, but there is the same error... I think that there is SIm-jacket problem.. It is destroyed as far as I think.. I should go for a change of sim card reader..

Cal-El said:
I second that. I would also check to see if the SIM is in backwards. Someone may have just cut the micro SIM wrong as well. Good luck. :thumbup:
Sent from my SGH-M919 using xda app-developers app
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Click to collapse
I don't think so.. I have the perfect-cut sim..

Got all right... sim slot problem was fixed.
Sent from my GT-I9505 using xda app-developers app