Fun fact: AIS "1 year SIM" lasts for 9 months
I've activated my SIM on 15th Oct 2021, and today 30th Jul 2022 I've got these two SMSs:
AIS
Your full speed Internet has 200MB remaining. After used up, get unlimited usage at reduced speed based on your package. To subscribe package, http://www.ais.co.th/netpackage/5g/
AIS
Your internet usages have been used up. To continue 5G max speed internet, just 99B. 4GB 7days or 150B. 9GB 15days, click http://www.ais.co.th/netpackage/5g/
ok nvm, gone shopping for yet another DTAC SIM.
// EDIT to clarify: I have "unlimited traffic" SIM, not "unlimited speed" one. And today my speed dropped down to ~100 kbps from tariff's 10 mbps.