As I was visiting Taiwan for only 3 days, I chose Taiwan Mobile's 3 day package for NT$300. It comes with 3 days of unlimited internet usage and another NT$100 of credit for calls/text. I later found out that the NT$100 credit was only sufficient for a 10 min local call. If you wish to purchase additional credits, you can do so at the convenience shops but reloading the credit in the prepaid SIM wasn't as straight-forward. You will probably be better off if you read the English instructions online. Also take note that your prepaid SIM has an expiry period of just 6 months from purchase or last reload.
Here are the instructions for reloading your prepaid SIM:
- Scratch the below silver portion to find the 14-digit password.
- To recharge,please dial 867(toll-free)from your prepaid card or dial,0935-120-867(on-net free)from PSTN or other mobile.
- Follow the instructions and enter the 14-digit password. Confirm that the charging process was successfully completed. For example: Call 867 -> press 2 = Pre-paid card account balance
- This pre-paid card can only be used once. Charging the pre-paid card automatically extends its expiry date by 6 months.
I'm not going to provide any links for this article as it was more straight-forward to go to the counters in the airport rather than reading up in advance from those online articles. In fact, I believe this article of mine is one of the most straight-forward ones already and equipped with photos.