I have a question about switching SIM cards. I currently have an iPhone 6 and 6+ from AT&T. Does it hurt anything to switch out the SIM cards periodically? I like to take time about using each device so I switch out the SIM cards. (I can't decide if I want to keep the 6+ or sell it)....but wondering if there are any drawbacks or potential issues doing this with the SIM's? Thanks!