I just got a free Motorola Edge 2022 phone from a promotion T-Mobile has been running for about a month or more. It's a pretty decent Android phone and seems to retail for around $350-$500 depending upon the memory and vendor. I am mentioning it in this thread because with PDANet installed, it works quite well as a WiFi bridge for travel. I have been testing it for over a week and it hasn't lost connection or varied the speeds it provides. When connected to just about any WiFi source the output is about 30-50% of the source speed. That is decent for a device that has over 24 hours standby, and is easy to set up and charge. It has a USB C charge port and a very bright screen, with up to 144 Hz refresh rate. They advertise up to 2 days use on a charge from the 4800mah battery.

I mention this because I see it being a great travel companion for situations where you have a per device charge for WiFi, such as some hotels, cruises, and especially aircraft. The free service that has been available for select cellular plans will only connect to phones, not tablets. With this system I can now view service on my iPads while in flight.

So if you have a qualifying T-Mobile plan, you do not need to add a line, just trade in a listed phone for this one. I used the free Samsung A32 they gave me 2 years ago in another promotion to get people switched over to 5G at the time. There is a huge list of acceptable phones going back as far as the iPhone 7 model, and lots of Samsungs.

Edited to add: This phone has wireless charging and a sim card slot, but no esim or headphone jack. I got mine through T-Mobile kiosk at Costco, so there was no $35 assistance charge and Costco gives a $75 gift card also. You apply for this on line and it eventually is mailed to you. They don't stock the phone, but I received it in about 3 days from T-Mobile.