What phones are compatible? If you bought a mobile phone last year, the odds are that it’s a 5G phone. Samsung’s Galaxy S10 5G, Galaxy S20, S20+ and S20 Ultra are all 5G compatible , as are the OnePlus 7 Pro 5G and OnePlus 7T Pro 5G McClaren. LG’s V50 and V60 ThinQ phones can use the technology as well.