Samsung did say it's ready to supply all US carriers with 4G phones, not just Verizon, and we may already be looking at one of those devices before us. Billed as a T-Mobile exclusive, the Vibrant 4G looks to be a gentle refresh of the current Vibrant handset, with the notable upgrades being the inclusion of 21Mbps-capable HSPA+ connectivity -- to speed your mobile broadband up into T-Mobile'
