Dear customer， Yes，Blackview A80Plus mobilephone supports 2G/3G/4G and WIFI. Welcome to the Official Blackview store-RingRing-BV. Our products have a two-year quality guarantee, and we will be responsible for every product sold. My SIM is 4g, and this phone supports 4g. The mobile phone is awesome, and the price is simply a surprise. Yes we have 4g with O2 works fine Yes it does support 4g Yes it does great mobile for the money better that some off the leading brands out there . Yes, but not 5G. I think so Yes####[['2G/3G/4G', 'Signal#Signal of Mobile Network', 'positive'], ['WIFI', 'Signal#Wifi Signal', 'positive'], ['4g', 'Signal#Signal of Mobile Network', 'positive'], ['mobile phone', 'Overall#Overall', 'positive'], ['price', 'Price#Price', 'positive'], ['mobile for the money', 'Price#Value for Money', 'positive'], ['two-year quality guarantee', 'After-sales Service#Exchange/Warranty/Return', 'positive']]