Longest lasting credit?
My old Orange number (now True) has expired, and I will have to get a new SIM card when I go to BKK later this week. One thing that I liked about my Orange SIM was that I could extend the life of the card by around 5 months (150 days, IIRC) if I topped up with a 1000 B card. Since I tended to visit BKK around once every 4-5 months, that meant I could keep the same number (indeed, I had the same number from 2003 until late last year).
My question: what are now the best pre-paid operators in terms of how long they will let you keep your credit / number without it expiring?
Thanks,
Michael