US Cellular model, G920R4, is now receiving Android 5.1.1… Model SM-G920R4 Model name GALAXY S6 Country USA Version Android 5.1.1 Changelist ******* Build date Thu, 11 Jun 2015 12:50:10 +0000 Product code USC PDA G920R4TYU2BOF7 CSC G920R4USC2BOF7 Looks like Samsung are working overtime to push…