Just a heads up.
Bought a cheap sim for testing and found this sim is not compatible with my current model Vivo phone.
APN menu is greyed out,on removing the sim APN became active. So tried sim in older 4g Huawei and it was OK but not reliable from my location,
Download at peak times 2mbps off peak 10mbps.
So I won't be investing in a 12 month sim,will try a short term DTAC to see if they have improved since 2022.