Dear All   Firstly I would like to say sorry that this treat maybe post in the wrong place. But I need to complaint about quality of N81 (production in China).   I bought this mobile in April 2009. Around mid of June, some buttons was failed, after that, it called out by itselfs. I sent it to Nokia Care center for repair, that used 10 days for replaced sliding set and format memory including software updated.   7 days after first repaired, all buttons except key pad lock and close button was failed and no responsed. So that, I sent it to Care Center again. This time, they changed "COMBO 768M DDR 1G/ SM/ V21.0.010" (something like analytical system) and formated MMC for me (7 days for repaired). 1 hour after I got it back from Care Center, the same problem occured.   7 days from that day, there are no any information from Care Center. I called them today and got answer that they will chage main board for me. Furthermore there are no due date for receiving my mobile back, due to they need to order that component from oversea T_T.   I need to know that Nokia in other country has problem like this or not? How do they control quality system in production line? How about their Care Center controlling system?   Please be noted that Service Call Center in Thailand is very very hard to connect (seems like it always busy) and I found many complaints in Thailand about this.