Last week i called cs to activate roaming service, the operator told me everything is done just follow the instruction bla2. Currently i'm in southern thailand when i wanna change the network got error said cant connect right now, pls try again later, when i swap sim to my wife's phone also the same. After 2 days of trying i still cant use the roam-onz. I'm using p70 btw.

Lastly i decide to buy thai sim baru ok

ok here's an update, looks like roam-onz only work when i was in hadyai, when i went back to yala/narathiwat area no good again. So mybe only in those place cant even connect to a nrtwork