Anyone can recommend me where or who provide service to flash let me know...I dunno how to do it
honestly speaking, if i am u, i will just sell and buy a local set.
reason being i am unsure will there be any teething issues with converted sets. so far is still unknown.
such teething issues afaik from reading forums can be like touch screen not responsive, fingerprint sensors not working properly experienced by
@Alexz_Hong , region locked, etc.
there is some guide in xda developer and youtube, but try it at your own risk. I wont share it here as i do not want to bear the liability if anything breaks.
P.S: Do note that the guide did mention there are some bugs after conversion
Personally for me, it is easy to flash as i have the experience of flashing and playing with custom roms. however, that is provided IF everything is smooth during flashing without any issue.