Switched from Verizon to Tello in Feb 2021. Tello had _just_ migrated to T-mobile 4G LTE. First 30 days was great. Test drove all over. Took a week trip Mar 2021 including OH, VA, SC, TN, and KY. Internet was *barely* usable. Rural, Interstate, big city did not matter. Could occasionally send texts and make calls. Frequent call drops between towers. My wife's phone was still on the legacy Tello "Sprint" network; and that allowed us to get _some_ 3G Internet service. Opened at least 6 tickets with support 4 issues. If a fix is not already posted on their FAQ docs, support has been unable to provide resolution. Key issues discovered in 40 hrs researching: 1) In FAQ, Tello does _not_ support "roaming"; only T-mobile towers, so I loose at least 30% coverage including my home. 2) Apple wants a hefty contract to "unlock" iPhone features and set carrier config; Tello has yet to pay. Which is why Tello's price is great.

MMS have never sent properly. I simply can't send images over either iMessage or MMS. This is on the old Sprint network AND now on T-Mobile. Data sometimes slows to a crawl and is unusable. It's probably better in other areas, but here in Provo, UT, it's essentially useless except for calls and SMS.

This is after several communications with Support.

Pro Tip: If you manually "change your plan" every 29 days it will carry over your minutes and data to the next month. So I just add 1 GB and 100 mins every 29 days, and they accumulate over time. Its really useful when I travel because I have extra data I can use from prior months.

They use the Sprint towers, so it's not the greatest. Also, unless it's my phone (iPhone SE 1), the quality of audio while doing a normal phone call is terrible.

However, their plans are at a very low price, so it's not too bad! I would recommend them.