|Headquarters||Fort Ree, New Jersey|
H2O Wireless (formerly O2 Wireless, not to be confused with O2 of Europe) is a United States-based prepaid GSM phone and Internet service. It is the brand of mobile virtual network operator (MVNO) Locus Telecommunications, a subsidiary of KDDI America Corporation since 2010,  via AT&T's network.
H2O Wireless Unlimited Plan allows customers to use any AT&T phone, even locked and contract phones, or a compatible unlocked phone (such as any unlocked T-Mobile phone). A prepaid "Monthly Unlimited" plan at $60 claims unlimited talk and text, unlimited SMS & MMS and unlimited data.
Due to only having one office, H2O Wireless sources its services to dealers who work as independent contractors under their own company name. Such sellers are known as "Authorized Dealers", such as Froggy Wireless with online stores.
- 2010: KDDI America acquires Locus Telecommunications LLC