I had the same problem, then i found this romPLease I need Help. It's been about a month that I'm using the phablet, but since the first week I have had problems with 3G connection and also in receiving pphone calls. The two sim cards seem to lose connection from time to time, and I can't receive phone calls neither. I have to restart the phone in order to be able to.
PLease Help me!
Before Flashing with sp flash tools.
Backup your contact and app.
Backup your BBM with titanium backup if you dont want to lose your current PIN.
Turn off tablet, go to recovery mode press power+volume down or up (i forget which one) haha
Wipe cache, wipe data. Reboot, turn the tablet off again.
Flash the new rom.
go to recovery mode again
Wipe cache, wipe data. Reboot
Now you have clean slate rom, without lost signal issue.
This rom not pre-rooted, if you want to root your device, download framaroot from xda.
Sorry for my bad english. I hope you understand.
Sent from my Freelander PX2 using Tapatalk