I went to Thailand for three weeks in November. I didn’t bring a phone or a laptop. I printed my maps, reservations, and emergency numbers. It was awesome. Don’t lock yourself into imaginary prisons.
I don't bring phones either. I go straight to the nearest mall/bazaar/market and buy one. Anyplace developed enough that you need a phone has them for sale. Anyplace where you can't find a phone has enough other people without them you can still get around. The phone gets trashed before I go through the next international border.