AIS is asking customers who received a notice to update their SIM registration details to match NBTC rules by 31 August 2026. It can be done free via the myAIS app ("อัปเดตผู้ใช้งานซิม"), by dialling *161*2*ID number#, at m.ais.co.th/webrepi, or at AIS Shops, Telewiz and authorised dealers. Unupdated numbers risk suspension, which matters if your business uses that number for banking, delivery or customer contact. Check whether any SIMs registered to your company or staff have received a notice. The article does not say which SIMs are affected or what the penalty is beyond suspension.