Hi guys

I own a 2Degrees Samsung GS3 that is running CM10.1. All has been perfect until a few weeks ago when I updated CM10.1 and my wifi started having issues.

I have preformed all the usual to try and fix the issue - factory reset, installing other roms including Samsung stock, searching the interwebs for fixes, and nothing has helped. 

My issue is exactly the same as a bunch of users in the thread below:
http://forum.xda-developers.com/showthread.php?t=1779535

After preforming a battery of tests, I have found the following:

1. When connecting to ANY 2.4GHz wifi router within 1m, the router reports my RSSI as around -80. (My Macbook Pro at the same range is around -40)

2. When my router reports an RSSI of -80, my phone actually reports -40's. (Using Stock rom and *#0011# code etc) 

3. Due to the signal levels my routers are reporting, my connection speeds @ 1m is max 5Mbps

4. As I move away from the Wifi router my phone loses connectivity. When it tries to reconnect, it displays 'authentication error'. I am assuming this is because the signal level is less than -90.


SO, what I am asking you all is two things:

Has anyone had this issue and successfully fixed it?

And, being that my phone has been rooted and is running a custom rom, does anyone have any experience with this and warranty returns? (I have decided that my Wifi chip/antenna is broken -and no it hasn't been mistreated!).

Anyone's comments would be appreciated.