Great value, nice app, some niggles
Tello gives great value phone and data. Signal generally good but sometimes seems to drop off, which may be an issue with my phone or gmail, not Tello. The app is easy to use and shows me my usage etc. I like the flexibility of changing the plan any time and you can roll over unused credit, but you have to remember your end of month date otherwise you lose unused credit. I would like a reminder 2 days before renewal so I could review my requirement for the next month.
I had a problem when relying on mobile data and had run out, but they didn't warn me and I just got a no internet connection message. You then can't use the app to add credit as there is no internet!