I have it on my android phone, it's only needed over 50kThb so I keep to below if I can, because it's really painful, what issue are you having is it installed amd registered on the phone ok? I seem to remember I had to have my picture taken at the bank. Give more details.
this group is help anyone with a question in Thailand, how lazy they are is immaterial. Your reply could be read by alot of people who (unbelievable) believe you.
You have to keep it for 3 months after your extension at 800kthb, then 400kthb until 2 months before your next extension when it needs to be at 800kthb