Writer of the guide here. I actually do tell you what to do in that case: - Take the cost and go physically to such a country - Use online services such as dt

Writer of the guide here. I actually do tell you what to do in that case: - Take the cost and go physically to such a country - Use online services such as dtmf.io and pay with Monero (there are others but I didn't test them and some are "sketchy" to say the least) But you could also just ask someone you trust in such a country to buy one for you (carefully) and mail it to you including a top-up voucher paid by cash. Otherwise well just don't use services that require phone numbers for verification. No other way I'm afraid.