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.
Question 1
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.
Question 2
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?
Question 3
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...