I am staying in the US for 3 months, and I want to have a cheapest possible mobile data plan for it. I think it makes no sense and is a waste of resources to buy a new phone just for that phone, so that solution I'd very much avoid.
What I've tried so far: my German SIM works and connects readily to T-Mobile network. This makes me assume that compatibility of local LTE bands and the ones my phone supports is not an issue. Yet, I have no connectivity with the two SIMs I tried.
Specifically, I tried with US Mobile and LycaMobile. When experiencing problems with the first, I specifically checked on LycaMobile's compatibility checker if my phone is compatible, which the site tells me it is. I also had no connection with LycaMobile, texted their customer support, had it work for a day or so, and then it stopped working again.
The facts that it worked for a while, that LycaMobile uses, afaik, T-Mobile network, and that my phone connects effortlessly with T-Mobile when using roaming make me assume that there should be a solution without buying a new phone.
But: how to I either get my phone work with LycaMobile, or any other carrier?
The phone is a SIM-unlocked Samsung Galaxy A5 SM-A520F, the TAC is 35260209.
PS: I don't care if I likely only get 3G rather than LTE, if I can get that reliably, at least.