I just purchased a 12 call top off card, 300 baht, and the additional time is only valid for one month. I thought it was usually longer, say 3 months?

P

I topped with 300 baht 2 days ago and just checked. Good until "Song pun ha roi ha sip". Year 2550. AT least 6 months.

I topped with 300 baht 2 days ago and just checked. Good until "Song pun ha roi ha sip". Year 2550. AT least 6 months.

It all depends on when your last card's expiration date was. When you buy a 300 baht card, its expiration is 30 days after the date you use it to add credit to your phone. For a first time purchase it would be 30 days from activation. If you've already had a number and have gotten a slew of cards and you keep accumulating 30 days on top of the previous card's expiration, you can quite easily end up with an expiry that is "6 months from now"... but it's not because of the individual card you bought. For that, it's 30 days.

I think the following is still applicable to One-2-Call refill cards:

300 Baht adds 30 days

500 Baht adds 50 days

800 Baht adds 100 days

to the current expiration date, up to a maximum of 366 days.

There may be exisiting promotions that actually increase these figures slightly, but I'm not sure if those are tied to a specific plan?

And by using *777 you can make changes the mean that your credit goes further but time last less or time lasts more but credit lasts less... Also friends and family type savings there too.