That after almost 4 years with my samsung s2 that still works and yes ... I spend at S6 shock because more access to the back to change the battery thing I had done with the s2 .. so I ' hope I will not have to worry battery .. 2nd concern the sim card, I had to order a nano SIM card from my supplier ... if I had known I would have done when ordering the phone !!! okay I will wait, then a big anxiety when the storage capacity of the phone because I had a sd card in my s2 and oufff has 32 GB of storage so you should be fine ... I expect my sim card for me report on its operation and I hope I will be able to load all my contacts ... not easy at the moment I have to say ..
