Hi I have an nano sim for my iphone 5 and some sim adapters for like going back to an iPhone 4 or 3G. I would like to know would there be any problem with me switching back and forth like let's say one week I use my iphone 5 and next week I use my iphone 3G, will the ppl at AT&T see like a change of phones a lot and cause a problem? Thanks for any responds