I know the general question has been asked multiple times but the situations seems so confuse to me that I wasn't able to find a definitive answer.
I am planning a trip to the USA (will stay in Jersey City to visit NYC for a week, than a few days in Boston) with my girlfriend and I'm trying to understand if our phones will work there, and at which speed (we will need a decent speed, since while being there we will take part in an event of the smartphone game https://ingress.com/)
I'm planning to buy a SIM (actually two, one each) there as roaming charges would be way too expensive.
She has a Huawei P Smart 2019, which, from what I was able to understand from FrequencyCheck will most likely not get more than 3G, is that right? I see it supports one (B2) of the four LTE bands used by some carriers (such as AT&T). Will that mean that choosing an AT&T sim card will make it possible to use LTE realistically? Not planning to go in remote areas -even if we do, then we won't care about good coverage.
I have Motorola Moto G5 (model XT1676) which seems to do even worse in the US. I am planning anyway to change my phone soon, is there any search site to specifically look for phones that will work ok both in the US and in Europe?
Is there any option to rent a phone in the US (maybe toghether with a SIM plan) while on holiday there? We will really need a decent internet speed but not looking forward to buy two new phones in case...