Hi, I have a TPG/Optus SIM and I've enabled global roaming before leaving but it wont connect to any network in Thailand.   I've spoken with tech support twice without luck.   Things I've tried: -Tested in two phones, both of which connect to DTAC and AIS networks with local sims (also my Australian Boost/Telstra SIM is able to connect to AIS even though roaming is not enabled on that SIM). -Tried connecting manually to each of the networks in Thailand (AIS, DTAC,TrueMove) with both phones. -Tried with 2G only, 3G/LTE preferred.   Any Ideas? ... View more