It would be a much better choice to take that pension to the Philippines where you can stay 3 years at a time on a regular tourist visa. No bribes, no shady agents and no risk to be denied for having too many stamps every time you enter the country.
that is correct. Or get the sim at thr airport, they have tons of SIM booths after the baggage carousels. AIS has the best coverage. True is the fastest in cities.