My S3 i747m works only with edge & H+ but not H or 3G
When i connect to H+ the data works fine but after a while it drops to H or 3G it necer drops to edge... When it drops data doesn't work anymore i can't make or receive any calls or sms as well... I tried mutiple threads and post but to avail.
I have to be using my phone in edge mode which is verrrrrry slow!
My APN settings are correct.
And sometimes it just drop service completely and then reappears after a couple minutes my sim card is new and my service provider says i modified the phone so they cannot help me.
Kernel version
3.4.95-cyanogenmod-gd56ed95
[email protected] #1
Slim version
Slimrom-4.4.4.build.6-official-5242
Is the phone running the latest modem and bootloader?
Sorry for the late reply yes i updated the modem and and bootloader but just to make sure please refer me to the latest for comparison
The latest ROMs for the i747m can be found at sammobile.com.
Who is the carrier?
Related
Hey guys! this is my first post on here and i need some help... I have an AT&T Samsung Galaxy S3 i747 and i rooted it, and put CM10.2 on it last night, everything went on fine however i used to have 4g everywhere and 4g LTE at my office, i noticed that CM10.2 doesnt support 4g for the S3(i dont know why...), so i cleared everything again and i put SlimBean build 5 on it.. still, my data is degraded one level.
my friend has the exact same phone but on verizon and his is working perfectly fine with SlimBean 5, i did use the AT&T version for the files on my phone. my Network Mode under system network settings is set to LTE/GSM/WCDMA and my APN is set to ATT (wap.cingular).. i tried the APN of ATT LTE (pta) and nothing changed..
any help on this is greatly appreciated!
again its an AT&T Samsung Galaxy s3 i747
did you reboot after you changed apns? have you tested the connection with an app like speedtest.net?
What is the icon by the signal bars? 4g? H+? Have you tried flashing the latest JB modem?
I have the ATT SGH-I747 with Baseband I747UCDLK3. The phone was rooted, CWM 6.0.3.1 Touch was installed, and has been running CM 10.1.x nightlies for a while and now is finally running the latest stable release.
When LTE was enabled by TMobile in Atlanta recently, I went from having a solid/working 3G/H+ data connection to no data at all. It is as if the phone would persistently try to connect to the LTE network and fail. It would also try to drop back down to 3G/H+ but have no working data connection ever since the day TMobile turned on LTE in Atlanta.
As a workaround, I set the phone to use Preffered network mode as: GSM/WCDMA and the Data has been working fine on 3G/H+ but of course not using LTE.
Is there any way to get LTE working in this configuration? Could this be a problem with the Baseband or is it CM 10.1.x?
TIA for any information you may provide to help me fix this problem.
dijuremo said:
I have the ATT SGH-I747 with Baseband I747UCDLK3. The phone was rooted, CWM 6.0.3.1 Touch was installed, and has been running CM 10.1.x nightlies for a while and now is finally running the latest stable release.
When LTE was enabled by TMobile in Atlanta recently, I went from having a solid/working 3G/H+ data connection to no data at all. It is as if the phone would persistently try to connect to the LTE network and fail. It would also try to drop back down to 3G/H+ but have no working data connection ever since the day TMobile turned on LTE in Atlanta.
As a workaround, I set the phone to use Preffered network mode as: GSM/WCDMA and the Data has been working fine on 3G/H+ but of course not using LTE.
Is there any way to get LTE working in this configuration? Could this be a problem with the Baseband or is it CM 10.1.x?
TIA for any information you may provide to help me fix this problem.
Click to expand...
Click to collapse
Correct me if I'm wrong, but T-Mobile uses different LTE frequency than AT&T.
Finally got it working, 4G!!!!!!
czechpunk said:
Correct me if I'm wrong, but T-Mobile uses different LTE frequency than AT&T.
Click to expand...
Click to collapse
I have finally gotten it to work. The problem was that the APN information necessary for LTE was missing.
I created a new APN manually with the information from:
http://forum.xda-developers.com/showthread.php?t=2236735
Name : T-Mobile LTE
APN: fast.t-mobile.com
MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
MMS Protocol: WAP 2.0
MCC: 310
MNC: 260
APN Type: default,supl,admin,dun,mms
Now the phone is working properly at 4G speeds, speed tests show over 25Mbps down and 10 Mbps up.
Thanks for the info!
Sent from my SAMSUNG-SGH-I747 using xda premium
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Hey, I have tmobile as my carrier and an unlocked at&t S3 i747. What baseband/modem are you using? I can't get a strong signal at all.
weird issues
So I have an issue. I have a i747 and have T-Mobile. My internet works fine. Sometimes. If I want to brows the web I have to first make a call And then my internet just starts to work. Usually... Can some one help me out.
so my carrier is metropcs and before deciding to root my phone i noticed that anything having to do with the tmobile variant works on the metropcs variant. i recently bricked my phone and lost all my data and even my recovery (forgot to move from storage to sd/computer) and i had to flash the tmobile stock. from there i flashed cyanogenmod 10.2 nightly and the appropriate gapp. now i noticed the under mobile networks ->access point names it lists by default a tmobile one(fast.tmobile.com). considering im from metro is this okay? and i noticed my signal bar now reads h and dc and i no longer get 4g or lte signal. i have tried 2 different metropcs apn's (fast.metropcs.com and if i tried the one named "internet" it just disappears). the fast.metropcs.com one works and i get an lte signal but i can not receive calls or sms. any help would be greatly appreciated.
itendswithyou said:
so my carrier is metropcs and before deciding to root my phone i noticed that anything having to do with the tmobile variant works on the metropcs variant. i recently bricked my phone and lost all my data and even my recovery (forgot to move from storage to sd/computer) and i had to flash the tmobile stock. from there i flashed cyanogenmod 10.2 nightly and the appropriate gapp. now i noticed the under mobile networks ->access point names it lists by default a tmobile one(fast.tmobile.com). considering im from metro is this okay? and i noticed my signal bar now reads h and dc and i no longer get 4g or lte signal. i have tried 2 different metropcs apn's (fast.metropcs.com and if i tried the one named "internet" it just disappears). the fast.metropcs.com one works and i get an lte signal but i can not receive calls or sms. any help would be greatly appreciated.
Click to expand...
Click to collapse
So I Google and tried another apn.
According to the post it is the stock metro apn setting, however I noticed if the lte signal is on I cannot receive calls or texts. This is distressing because I can browse the Web but can't receive anything or send anything.
Does anyone know how to fix this? Could this be a big with cyanogenmod?
I have a SGS3 I747M from Canada Fido and now using in Pakistan after network unlock. It does not register on GSM 2G/3G network whenever the 2G signal strength drops approximately below -70 dbm. It can neither make nor receive a 2G call
Things tried so far
tried all available modem drivers from XDA Forums
tried on stock Jelly Bean 4.3
tried on stock KitKat 4.4.2 (currently on it)
tried changing to airplane mode and back
tried change network mode to 'GSM Only'
tried signal boosters from android market
But nothing works.Only where signal is strong around -50 to -60 dbm it is able to connect to the network.
have tried it on two different operators Mobilik and Warid but result is same.
What can be done to fix it??
bigmark1 said:
I have a SGS3 I747M from Canada Fido and now using in Pakistan after network unlock. It does not register on GSM 2G/3G network whenever the 2G signal strength drops approximately below -70 dbm. It can neither make nor receive a 2G call
Things tried so far
tried all available modem drivers from XDA Forums
tried on stock Jelly Bean 4.3
tried on stock KitKat 4.4.2 (currently on it)
tried changing to airplane mode and back
tried change network mode to 'GSM Only'
tried signal boosters from android market
But nothing works.Only where signal is strong around -50 to -60 dbm it is able to connect to the network.
have tried it on two different operators Mobilik and Warid but result is same.
What can be done to fix it??
Click to expand...
Click to collapse
I'm not so sure about this but perhaps the device doesn't have the right frequencies (being a Canadian variant).
That being said, You could try different baseband and modem. I'm not sure if will work but worth a shot.
BWolf56 said:
I'm not so sure about this but perhaps the device doesn't have the right frequencies (being a Canadian variant).
That being said, You could try different baseband and modem. I'm not sure if will work but worth a shot.
Click to expand...
Click to collapse
I747m does support gsm 900/1800 which are supported in my region.
I have already tried all I747m modems available on xda forums but i guess these are all for canadian networks.
Can you suggest if i can use a modem for another s3 variant released for pakistan.
Would any custom rom/modem be able to fix this?
Problem is only when it detects weaker signal. Though other handsets connect comfortably in the same spot. If i move around a bit where signals improve, it connects and works fine
could there be a low signal threshold programmed in this device for power saving or something
Only flash things that are for your device model. Flashing s different devices modem is a great way to hard brick.
Sorry im not sure about a solution. Just wanted to at least warn you against flashing a different modem.
Have you contacted your carrier to see if they might have any useful info for you?
I recently got this phone and everything works fine except 3G or LTE, Edge works but can't get 3G working ... any solutions? Thanks friends.
help would be highly appreciated.. im I really stuck with edge?
Check what frequencies your network uses, and see if t999 supports them. If it doesn't, then you're stuck. Also make sure the correct apn for 3g or LTE is selected