[Q] Can't connect to 2G or unable to reach signal after lost it - ONE Q&A, Help & Troubleshooting

Hello everybody!
I have this kind of problem:
my OPO suddenly have signal problems: it's unable to connect to 2G signal (returns me "No signal" label), if I want to search for networks it returns me "Error while searching network" and if I lose signal (for example when I go to the metro underground) it can't reach for signal anymore once I go out.
My IMEI and baseband version is shown properly though
I tried:
Change several ROMs, from paranoid to nightly
use Msm8974DownloadTool to restore it
reflashing by fastboot several version of CyanogenOS
restoring EFS partition following this guide http://forum.xda-developers.com/oneplus-one/help/fix-brickloop-audio-fx-fc-efs-corrupt-t2879061
What can I do now?
Thanks in advance

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hii guys....
i have recently discovered network problem in my ace plus running CM11
The problem is that my phone shows "no network available" in those areas where network is available......but if, i put my sim in another phone , their is no such problem .....
Also i am not able to search for network in manual mode and auto mode doesnt work........
Any other sim in also not working ......i tried idea sim but failed to get any signal.....
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beastwolf said:
hii guys....
i have recently discovered network problem in my ace plus running CM11
The problem is that my phone shows "no network available" in those areas where network is available......but if, i put my sim in another phone , their is no such problem .....
Also i am not able to search for network in manual mode and auto mode doesnt work........
Any other sim in also not working ......i tried idea sim but failed to get any signal.....
Is their anything i can do ....to get rid of this annoying problem !!
Click to expand...
Click to collapse
Reflash ROM, be sure you wipe data,cache and dalvik-cache. If this doesnt work, move do different ROM.

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Have you had good 3g in the area before?
SENT BY ENTANGLEMENT
i am at good 3g area. i tried my sim on my other phone and it could connect 3g but my n5 cant connect .
Go into settings. Where it says more press. That will take you to Mobile Networks where you can choose 3or4 g
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