iphone 6s questions | Phone/Device Issues and Features | Consumer forum

Hello!
I am aware that I require a nano sim card for this phone and I dont believe speakout carries these so I will have to cut down the current card I have in my iphone 4. Other than that I am wondering if there is anything I should know before purchasing the phone. On my iphone four many things are very outdated. My imessage is a bit funky but I believe that is because im still running on iso 7 and the phone is simply old and cant handle new software. My FaceTime dose not work at all and I believe this is due to the same reasons my imessage is funky but want to confirm that speakout will offer and support all of the features and benefits of the new iphone 6s. Thanks in advance!
Beau