Find my details:-
software: windows phone 8.1
OS version: 8.10.12393.890
Firmware revision number: 3058.50000.1525.0001
Hardware revision number: 1.5.0.1
radio software version: 2.0.242037.8
chip SOC version: 8227
Extras+info
Lumia cyan
Device activation client 1.4.2.9
Firmware Updater Notifier 1.1.03
..... and so on
Manufacturer:-
RM-914_im_india_269
I was using Lumia Black and updated it to 8.1 ( Cyan) from my phone itself ( official release). I updated to Cyan OS not longer than a month back. Everything was fine, until recently, a couple of days earlier, when I was talking to a freind of mine on my phone, the call dropped. A notification to restart my phone appered so I did it. Ever since I am stuck on the , " Airplane mode". The flight mode will rapidly switch on and off. So, I am unable to use my Sim and thus, no whatsapp, no calls..social life has been paralyzed.
I tried Hard reset ( about menu-> reset your phone) :- three times
Soft reset:- several times
Changed SIM :- a dozen times
Tried the twitter team suggestion ( I had found on this forum itself :- http://discussions.nokia.com/t5/Nokia-Lumia/Lumia-1520-3-and-official-8-1-stuck-airplane-mode/td-p/2855086)
Now trying Nokia Software Recovery Tool 1.5.0 but the problem is that it is downloading 3058.50000.1425.0001, which I beleive is 'Cyan' again. I am also worried, I won't be able to downgrade to Lumia black which I am missing a lot. Anwho, I am currently downloading it and will see what happens, but If Nokia's Technical team can provide a solution for this software/firmware related glitch, I will be a happy fella. I am wondering, about the first occurence of this problem which I researched as being reported on Nokia official forums, 2-3 months back. By now a trustworthy solution should have been found and posted online.
I know I am a bit late to the party.
Very recently, I too fell in the same trap and tried a lot many things in vain.
But then, I followed the instructions stated here : http://forums.windowscentral.com/nokia-lumia-520/243898-guide-users-who-didnt-get-proper-amber-update.html
It worked like a charm - but yes - it would essentially be taking the software to a lower version.
After installing the lower version, you may choose to go to phone updates > keep on updating until in one upgrade - it says that it will be upgraded to 8.1 - proceed no more [or else the phone again goes back to permanent flight mode].
Hope it helps.