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[Q]call keeps failing.

sometimes when i try to make a call on my sgs4g it keeps saying call failed even when i have full signal. I would then have to turn my phone off and back on to make a call. is there any fix to this? thanks in advance

It happened to me too. Help please!!!
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We need more info than that. What Rom are you running? What was your data type (E, 3g, 4g?) and signal strength?
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Stock ROM, rooted.
Sent from my GT-P1000 using XDA Premium App

Could've just been a bad signal area.

Same here stock tom rooted on running 4g. Thing is happens a lot.

Really slow internet!

Using Scotts awesome cm10 ROM,
I'm getting approx. 300kb each way. I've tried both apn changes listed in the forums, but it didn't help at all. Speed test was done outside with full bars.
Should I look into flashing my modem next, or is there something else?
Thanks in advance for any support!
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hattrickinc said:
Using Scotts awesome cm10 ROM,
I'm getting approx. 300kb each way. I've tried both apn changes listed in the forums, but it didn't help at all. Speed test was done outside with full bars.
Should I look into flashing my modem next, or is there something else?
Thanks in advance for any support!
Sent from my SGH-I997 using xda app-developers app
Click to expand...
Click to collapse
Bars and data are different...I can have no bars and still have data on my phone...I've had no bars and lte on my vivid...and even if you have a good data connection there are other factors that effect speed...could be a lot of traffic, maintenance on he cell towers...
Sent from my SGH-I997 using Tapatalk 2

I had the same problem with that ROM. I couldn't fix it and I flashed numerous modems.
Sent from my dr0id running Liquid Smooth r0m

What data plan are you on? Perhaps you are being throttled
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Try a non CM Rom and see if it improves.
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Go to your about phone section and see if your imei number shows. Let me know
Sent from my dr0id running Liquid Smooth r0m

It didn't happen with a non cm10 rom (months ago) and yes, my imei is shown
Sent from my SGH-I997 using xda app-developers app

it might be a corrupt imei with weird symbols. Double check it with the imei under the battery
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It all matches..
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Solved?
Did you find an answer for this problem? I'm having the same issue and even worse, i'm getting really slow speeds (64kbps download - 240kbps upload) which is ridiculous.

Change imei back to tmobile

Okay. So I bought an unlocked g2x brand new from Amazon. Everything almost works as it should: calling,wifi,texting ....the thing is I cannot send or receive picture messaging.
I spent hours on the phone with T-Mobile (ironically bought an unlocked phone that was originally T-Mobile to use on T-Mobile network. Funny right?) and they say because the imei number is unlocked I am unable to do picture messaging without a data plan. I can't afford a data plan right now.
Anyways I'm hoping there is a way to change the imei number back to being T-Mobile specific. In other words: I want to lock my unlocked phone back to T-Mobile.
All I want is picture messaging. I shouldn't have to have a data plan to achieve this. Can anyone please help?
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It shouldn't be your imei, it's your apn settings. Go to settings, wireless, network settings and make sure your apn is set for tmobile.
My phone is unlocked and I send pictures without a data plan. Just remember that you need to have mobile data enabled. It uses data technically, but it's incorporated with your texting plan.
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You sir are a genius. That actually fixed my problem.
Now, I have data blocked on my phone so I shouldn't be able to use the data thing even if I tried. ...
I did activate that setting and upon successfully sending a text,the 4g logo does come up where my signal strength and battery are shown. Can you confirm this to be normal? I don't want any extra charges on my next bill....
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Call them and make sure there's a data block on your phone. You won't get charged. And yes the 4G logo will show when sending an mms.
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And hopefully this time you get someone who actually gives you accurate info
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I spoke with the T Mobile representative. I believe her exact words were : Now you're not supposed to have multimedia messaging on an unlocked phone, But it's changing that setting give you the ability to do so then that is great.
Haha. But yeah she basically is telling me what you guys Are telling me I cannot thank you enough.
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I can send mms. But I can't receive them.....any ideas?
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Data turned on when downloading it? Edit your APN, make sure the APN is set to etc.tmobile.com, mmsc set to mms.msg.t-mobile.com/mms/wapenc, mac set to 310, mnc set to 260
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Did you mean to put "Epc.tmobile. " on access point names?
Would I be asking to much for a little help navigating to those particular settings?
Thanks redmonke.
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Ok after rereading, I see you said to edit my apn, which I assume is short for access point names. Should I edit the only one that is there which is "T-Mobile us, Epc.tmobile. com "
Or should I create a new one?
This is of course assuming that apn is access point names.
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I did what you suggested, although I had to Create a new apn rather than edit the original because the original will not let me edit it....
After creating the new one, I suspect maybe a miss type in the settings. "Etc " is what I believe you said, but upon using that setting I could no longer send pics.
Once I changed it to "epc " I was able to do so.....
Anyways after creating the new apn as per your suggestion, I noticed that it was an exact mirror of my original apn.
But here's the kicker:
I was able to receive pics so long as my buddy selected to forward it rather than sending it directly (if that makes any sense) .
I then tried to have him compose a fresh message and select a pic to send....to no avail. I also had another friend attempt to do the same only to achieve the same results.
I am having zero issues sending pics.
And so long as data is enabled, I am able to do so.
Its the receiving pics that is giving me the issues.
I don't understand why I can receive forwarded pics....
If anyone can help I suppose I can send my cell number,(with great apprehension) ,via pm to someone who is willing to trouble shoot....
LG g2x p999
Android 2.3
Purchased new and unlocked from Amazon.
Also, not trying to open a can of worms ; but if I install a newer version of android would that rectify the situation I am having?
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Go to settings and about phone. What os version are you on?
Sorry for taking so long to respond I've been busy with school.
Sent from my Nexus 7 using Tapatalk HD

I assume you mean android version: 2.3.4
Kernel :2.6.32.8
Build # grj 22
Thanks for sticking with me bud.
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Hm so it looks like you are on the latest version. Did you do a factory reset when you got it?
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No I didn't...would that somehow lock my phone to a specific carrier?
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No but something might be messing up the mms.
Sent from my Nexus 7 using Tapatalk HD

Do you think if I installed a newer version of android I would be able to send and receive texts???
Or if I root it?
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Root no, if a factory restore doesn't then I'd wipe data and install cyanogenmod and see if it works.
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Network mode problems after cm10 and sim switch

I'm using an infuse 4g with JB 4.2.1 cm ROM. I unlocked my phone and put in a T-Mobile prepaid sim.
I'm supposed to have 4g consistently but I'm getting 2g(edge), 3g(umts) and on very rare occasions I get 3g(HSDPA)... Its approximately 70%-%20-%10, respectively. And these changes are all happening in the same household. No tower switching.
I only have the option to switch on 2g only in my network mode settings on cm10... APN settings are correct and all T-Mobile can say is that I won't get 4g if the tower doesn't support it..
Are there any possible solutions to obtain 4g at all?
If so, how do I keep it on all the time?
Do I need to install a new modem?
If so, which?
Any comments and/or answers would be greatly appreciated.
Thank you.
Sent from my SGH-I997 using xda app-developers app

Using Uckl2 at the moment. FYI.
Also, I know the modem is for WiFi but does it affect carrier data? If not what can I change to affect my data connection?
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I always thought the opposite. I thought modems were only for mobile data. But does switching modems help?
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Could increase or decrease your signal and rate at which data is downloaded and uploaded depending on your modem of choice. Battery life is also affected minimally (usually).
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Hmm, didn't know that... Well thanks for the lesson but have you tried switching modems?
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I switched through a couple and uckl2 seems pretty stable but no change on carrier network service.. I want to put on kl3 but I can't find the download.. Not too many options for my phone though.. That I know of.
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It might just be your location.
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Since I changed to cm10 and switched to T-Mobile sim I have yet to have 4g. Tried where I'm at now and up to 70 miles from here... Very weird. I can't tell if its T-Mobile or the ROM.
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Have you had it before on the same phone? Have you tried using another 4g phone?
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Yeah I had 4g on it before, on att and on metro. Both while using stock Froyo rom and GB aeon rom.
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Weird, it sounds like its the network then
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Yeah that's what I'm thinking but when I called T-Mobile, they said that they cannot diagnose a non-tmobile phone. The only info that they can give me is that they assume its my location and possibly the modem but they cannot guarantee switching modems will work. Doubt they hack phones though, Lol
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from my recollection..not from experience:
T-mobile or networks other than AT&T will only give you: edge or 3g.
No 4g or hpsa+
to get better than 3g, you need to be on AT&T

When the phone is on "H" I ran a speed test and its pushing 5 to 7 mb download speed. Is that close to 4g?
Any advice on how to stabilize the network?
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Azrael-09 said:
When the phone is on "H" I ran a speed test and its pushing 5 to 7 mb download speed. Is that close to 4g?
Any advice on how to stabilize the network?
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Click to expand...
Click to collapse
yup.. 2-6mps for most.
if you are in an urban area and close to a tower, some are reporting 8+
look back in the old threads..i recalled these discussed toward the beginning of device release..jun jul aug 2011 era

Appreciate it, thanks!
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Here's some ss's. All data is from the same 2 feet radius soooo... No idea why.
Running CM10.1 - JB 4.2.1 - OC Kernel - UCKK2 Modem
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[Q] No 4g galaxy s3

So i just bought a galaxy s3 off ebay got it in the mail, put my 4g sim in. But i have no 4g...i know my sims good because i tried it in another phone. I tried restoring to factory using odin, i installed a custom rom and checked my roaming settings and they were all good. Ive 100% wiped multiple times. I am at a loss as to what to do. I can do everything except i have no 4g...only 3g. Any suggestions on how to fix this?

You may need to add the ap info. Go to settings/ more settings/ mobile networks / access point names / click on the apn to view the settings or just manually enter what u see in the pics below. Good luck
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I bet they unlocked it to verizon.
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cfaulk said:
I bet they unlocked it to verizon.
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Click to expand...
Click to collapse
I was just about to post about this until i found your thread.. i'm having the exact same problem.
and i even got mine from ebay too lol..
have you guys found a fix for this?
did that apn info work?

Yeah is it VERIZON Galaxy s3? Or another carrier?
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