Develop Bugs

[Su640] Weak 2g signal on Stock rom

Hi there,
I am facing an issue related to 2g signal on Su640 stock rom v30d.
2g signal is almost 0, and sometimes the phone shows emergency call only. I must switch network mode to 3g in order to make calls.
If I flash CM10.1 rom, 2g signal is very strong.
Do you have any idea how to fix this?
Thanks in advanced!

[Q] 3g and 4g problems

since i unlocked the phone i am having problems with my phone
It refuses to stay connected to 3g networks . it connects but after a while it disconnects and doesn't connect again only( if i reboot the phone it does but drops again)
Forcing WCDMA only doesnt fix it , if i choose GSM/ WCDMA it reconnects to gsm
If i pick LTE signal i can do everything but receiving calls it says its turned off
I tried:
Installing stock firmware ( currently 4.4.2 DTM unbranded) and other custom firmware
Getting new sim card and changing carrier ( its not a carrier issue)
All Apn settings are fine
please advise

ok 4g according to info i saw i cant receive calls , however i want it to stick with 3g witch due to my problem has been impossible
signal bar drops after being full and ban no signal

Anyone?

Signal Drops == not fully compatible modem

Installed cyanogemmod and the issue is gonne used all day no issues

no calls or data on ROGERS Canada

Hi all, I hope I can get help here since I'm getting crazy trying to have my p8000 with Rogers connectivity.
I've tryed on both Stock and Eragon roms with same results.
The phone seems to only be able to find 1 network - ROGERS 4G. It registers it, but then I can only get the messaging to work... both calls and internet are still down.
Also important to say that the reason why I can't see the LTE might be related to my old sim card. I'll be replacing it soon.
Anyways, in the mean time I could use some help with:
- assuming I can only connect to the 4g, should I be able to have calls at all? are calls delivered through 4g? 3g? 2g? all?
- Any reason why I can only see 4g? is the phone not capable of connecting to 2g/3g?
- anything else I could try? different modem drivers, some app to assist on this?
Thanks

update
I partially solved the issue...
few notes.... since I leave in canada, the 3g frequencies do not work...
So, I can only have internet with 2g or 4g....
no this brings one other issue regarding receiving phone calls while phone is in 4g... it does not know the calls are coming since they are transmitted using 2g... any way phone monitors 2g incoming calls while using 4g internet?

Hi
Any progress on this. I have the same issue (p8000 and rogers) Have you found a solution?

I'm on Rogers with the P8000. When it is showing 4G, I'm surfing away fine. Making a call, it switches to 2G because like most carriers (other than Wind/Mobilicity), voice calls are on the 2G network. I dont believe the P8000 has 3G bands that we use in N.America so you are only going to get 4G or 2G.

According to willmyphonework.net, the P8000 is able to use all of the frequencies. Therefore, you should have 2g, 3g and LTE.
Is this not the case?

Network Issue, No Service

I am having Strange problem with my Verizon M8, S-Off, Unlocked to all networks.
I do get data and Network Signal but after sometime , suddenly it gets lost and i get NO SERVICE. Again after sometime it again receives the signal. It can even take hours to get signal at times. be it 2g or 3g
I have tried reverting back to pure stock unrooted 4.4.2, 4.4.3, 4.4.4 and 5.01. Still couldn't resolve the issue.
What can be he problem. Can it be the signal cable (Antenna) or other hardware Problem..

Signal receptivity poor for Lte band on custom rom.

Can anyone pls tell why is the signal receptivity of custom roms poor for Lte bands.I had a hard time using jaguar ,aex ,viper is rom as their is frequent signal dropouts and IAM not able to use my jio Sim properly which was not the case with my stock room.Pls help and do telle about any way to fix this problem?