I used the stock Samsung SMS/MMS app. Works absolutely fine for me. Tried Google Messenger - horrible experience. Tried Hangouts - not the features I was looking for. Went back to stock. After reading through here yesterday, I decided I'd like to try Evolve. After the set-up blunders for MMS were figured out, I'd say it works fine. Although one question came up. When I send a photo I took in portrait mode through MMS, it sends it in landscape mode and when the recipient receives it again, it's in landscape mode. Odd.