flight mode not turn off in LUMIA 520

[Windows Central Question]

in my nokia lumia 520,when i turn off flight mode,the butto will rapidly switch and is not going off.
network symbol is not shown but in settings >network,it shows the sim name,number,etc.
also imei is not shown.

anybody plz help,am a student.

i hav done too many hard & soft resets, used windows recovery tool ,nokia software updater(nsu-retail) but no hope..

plz help..
suggest smething working.

 

[ven07]

This is, unfortunately, a known problem when it comes the 520.. There are a few videos on YouTube that provide solutions. Give those a go?

just search the terms: lumia 520 flight mode issue

If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Windows Central.

 

[RumoredNow]

This problem has been pretty well identified as a fault on the daughterboard that houses the antenna (and other components).

Try this method to "jumpstart" the bridge between mother and daughter boards: 1520.3 airplane mode stuck

Look here for how replacing the daughterboard corrects the issue: Lumia 1520 stuck in airplane mode? It is caused by a defective microphone/usb daughterboard.