Hello, guys
Recently my Galaxy S3 GT-I9300 stopped reading the SIM card. I sent it to be fixed and what was my surprise when they informed t me that the cost to be fixed was 180 Euros!? I have investigated in the web and I have found a simple tutorial that could resolve it simply substituting the SIM and MMC card reader part . I bought and substituted it, but for my unluck, the problem persisted.

With this scenario I would like to know what might be the root of this problem. Could it be a motherboard problem? Would you suggest another way to resolve it?

I have found some motherboards selling on eBay. Do you think one of these would resolve my problem? How to substitute it?
Thanks!
Antonio
Recently my Galaxy S3 GT-I9300 stopped reading the SIM card. I sent it to be fixed and what was my surprise when they informed t me that the cost to be fixed was 180 Euros!? I have investigated in the web and I have found a simple tutorial that could resolve it simply substituting the SIM and MMC card reader part . I bought and substituted it, but for my unluck, the problem persisted.

With this scenario I would like to know what might be the root of this problem. Could it be a motherboard problem? Would you suggest another way to resolve it?

I have found some motherboards selling on eBay. Do you think one of these would resolve my problem? How to substitute it?
Thanks!
Antonio