Coming from Pattaya Tai go into the market on the left had side...this is the covered one with two huge ceiling fans....walk to near where there is motorcycle parking and turn into the market look for the wall on the right hand side and about a third of the way down (opposite some nail/eyebrows ladies working) he has his stall there...name not known a youngish guy sat at a table sometimes with his GF...he`s the only phone repair shop in the whole market and he,s been there for a long time nice chap and knows his stuff if he cannot do it he will say so and you will not be ripped off