Originally Posted by
yann
Hello,
How complicated/expensive is it to extend tourist SIM Cards beyond the original period ?
We would like to buy an 8-day card then extend it if necessary.
We'll only be using it for Internet access when no wifi is available.
Thanks in advance.
Not difficult. Normally they get extended every time you pay to "top up" (add credits), which you can do at e.g. 7-11. Different providers also have different codes you can you can enter to deduct existing credits to extend directly, but you'll have to google your specific provider (TRUE, DTAC, AIS) to see what codes and how to do that.