Samsung Galaxy 551 GT-I5510M- Unlocked GSM Smartphone - White 2G Network: GSM 850 / 900 / 1800 / 1900 3G Network: HSDPA 850 / 2100 Unlocked; No Retail Box, White Box Only Work with: Rogers, Fido, Telus, Koodo, Bell, Virgin, AT&T, and other carriers that has same frequency as the phone. Not work with: MobiliCity, Wind, Videotron, T-mobile and any CDMA network.