I assume he is in Thailand which only AIS will work as they sell through that operator officially for a few years now but not TRUE/DTAC (TRUE and DTAC merged a few months ago which Asus might not bother for the time being)
Please enable volte for Orange Spain. Volte for this company works perfectly because I can activate it with a code, but every time I reboot you have to reapply the code to activate it. Please make it permanent.
