can I switch SIM cards between two iPhone 5s

How about SIMs from two different carriers? I have my 5S set up with an Australian carrier SIM and my SE with a US carrier one and will want to swap when I get to Australia.

The 5S has only 16GB and the SE has 64, so I want to be sure I get the apps right and don't overload the 5S when I do the swap.

Best to back up in iTunes or via iCloud for this?

PhishPond wrote:

i have a new refirb iPhone 5s with more storage than my current iPhone 5s. Can I just swap the SIM?

assuming both phone and sims are with the same carrier you should be able to switch it.