I carry 2 phones in thailand.my American phone i use the wi fi at the local hotels n use my old phone with a 7-11 Sim card I purchase n get a thai local no.This way I still get my overseas messages n n the thai tel no to speak to the locals in thailand
Vietnam is far much better than thailamd.cleaner cheaper n much more to see n do such places like Da Nang Na Trang n Phoc qouc. Minus less freelancers n less food to choose from less ppl speaking English n the Dong dollar is difficult but it's very place n it's very beautiful
Once u arrive in bangkok u be given 60 days n then go to thai visa center n tell them u want an extension. Let them take care of it.its easier n faster