Review on 📲 KSUN ZL20 - 3G/4G Network Walkie Talkie Phone with Zello Real PTT, Long Range 100 Mile Handheld Smartphone, Wireless WiFi Camera, GPS, LED Touch Screen Android by Julian Davidson

The main problem with this device is its inability to work on multiple base media. At the moment I'm using it on T-Mobile, but it only supports the 3G band. This group is supposed to end in 2022, who knows if that will come, but in my opinion not worth buying for such a short period of time. I also tried US Mobile (but it's just another version of T-Mobile). I didn't have any other SIM cards available, but after some research it turned out that the common bands are B2 and B4 (this is for ATT, T-Mobile). and Verizon), neither of which are supported. 4G functionality aside (a major issue) this is a great device. Loud, clear microphone, battery life is long, typing is surprisingly easy, but its main purpose is 4G, so it's useless to me.