dont need a mobile number for an extension, although ur right, the sim must match the name for ur bank account
most banks gave you till april 20th or sol to sort that out
To get a extension using a agent u need
a passport
a Bank account
2 photos
12-25,000 baht
problem with the Pattaya agents, you need to travel to and wait in Pattaya till the extension is done which is a hassle Unless u live in Pattaya 🙂
Thai visa centre, you mail them ur passport, Plus can also use any bank & dont need mobile banking, for a little bit more baht.
100% reliable