Hi..
I also one of the customers who bought PS Vita 3G from there..
My Vita suffered some problems too; 3G function broken, game crashed and some other things..At that time,
my Vita cannot play anything because it stuck at the setup screen...I read online that some people worldwide suffered the same problem as me..

I went to shop for warranty (around 4 months ago, in July) and they said they will send my Vita to Singapore for repair..

After 2 weeks, they called me about my Vita has been repaired and when I came to the shop, I discovered that
my Vita still has same problem..I'm not sure whether they really sent it to Singapore or they fixed it by themselves..
So, my Vita still need to be sent again..

and now...they said it's still in Singapore which is quite for so long for them to repair...I came to the shop last 3 weeks
and they said it's still there..Since it's been so long, I asked them if they can just replace it with Vita Wifi only or just have a new replacement, but they said just wait for response from Sony Singapore..

For this case, I have not yet get any bad or rude response from the user, eventhough I kept PM him about my Vita status..
and I don't think I want to accuse the shop owner for having a bad service (at least for now)..
but after reading this thread, I feel sorry for TS...

I just hope the shop owner can give better service quality and responses for their customers..
or now, I just wait for the current status of my Vita and TS's Vita as well..Hopefully we can settle this nicely..

I'm in patience because at that time, it almost and was in Fasting Month..and it still affected until today..lol..
I'm still waiting for my Vita though, eventhough I really wanna play it and I have missed quite a lot of Vita games..

but in positive note, at least I was focusing my assignments too much when my Vita was not with me..and now, I miss it already..