Frequency band: GSM 850/900/1800/1900 + WCDMA 850/2100. Android system: 4.2.2 not ok to update. Wifi: yes, no hot pot. Zello system, no distance limited. The item "A18 Zello PTT UHF Walkie Talkie Rugged SmartPhone 3G Waterproof Android Phone" is in sale since Friday, August 30, 2019.This item is in the category "Cell Phones & Accessories\Cell Phones & Smartphones". The seller is "bestseller0823" and is located in Shenzhen. This item can be shipped worldwide.