Need to replace the wifi and bluetooth module

Hello !

I have a problem with the bluetooth and wifi of a Galaxy SIII (GT-I9300).

The problem isn't software. I flashed the phone with stock and custom ROMs, the problem stays.

So, I now want to try to replace the wifi and bluetooth module soldered on the mainboard. It's not a daily intervention for me and I need advices and probably, some tools.

Can you help me please?

Any other proposal / solution is welcome :)