Im not sure Im still pondering on the fact why did they say it would be an issue with the mother board? The other issue with my phone is SIM 1 slot is not working as my son tampered it & so my warranty is lost.
Your son is innocent. Even I doubted my son in the beginning, until I saw in the forums that a number of people who did this update had the same issue. I have the following problems.
SIM slot 1 not recognized
Mobile internet (data) does not work
If you have a solution, please post it so that everyone can benefit from that. None of the methods i came across in forums worked for me yet.