Could I replace my iPhone 4s?

Well, the lock button is broken now, it freezes when the screen/keyboard is sideways and it just keeps getting slower… And slower… And SLOWER. It is getting very inconvenient and it's becoming annoying. I can't turn my phone off because I need a charger to turn it back on. I haven't even had it 6 months… Could I replace it for a new one?

Do an itunes restoral… If you still have the same issues, call Apple or your wireless carrier for a free warranty replacement since your are still within the first year of ownership

Yes, iPhone 4s is not much popular as the previous. Do you know that in my opinion apple produce iPhone 4 and 5 in much same time due to its defects. So i recommend you for iPhone 5.

I have HTC one x+ 64gb, if you wanna change with mine, mail me at jagbirkhehra88@gmail.com
I wanna use 4s.