The ease to change plans and the cost, cost, cost.

The ease to change plans and the perfect call quality courtesy of Tmobil for far less cash! Having a single line of cellphone to cost under $15 is a huge help to my budget and I even have international calling options if needed. Finally when I got a new NUU10 cellphone and put the Tello chip from the old too the new it simply worked. No hassles and my original Sim was available on Amazon to get me started.

Excellent Customer Service

From my first day with Tello, my communication with Customer Service has been excellent. Can't say enough good things about this cell phone company.

great but expensive roaming

Everything has been great, especially with the eSIM which I could do over the web last year before travelling to the US. Working "over wifi" on my iPhone, even SMS text, is great when I'm not in the US. Payment (card, apple pay...) works fine. The only pain points: * the app UI is a little confusing sometimes (but not terrible) * Roaming in Europe is a bit on the expensive side. It only works in "Pay as you go" mode and 1 cent per MB is too 5 years ago.