Carrier AT&T One SIM and two iPhones

[austinriceone]

I want to get a 6S Plus, but the screen is not small enough to be practical at work.

Can I put the SIM into my 5S while I'm working and switch it back when I get home everyday?

Please cite your sources if you know anything!

 

[Sketchr]

I want to get a 6S Plus, but the screen is not small enough to be practical at work.

Can I put the SIM into my 5S while I'm working and switch it back when I get home everyday?

Please cite your sources if you know anything!

You can have one SIM and a dozen at&t (nano SIM) compatible phones if you'd like.

Yes, you may switch around SIMS at any time.

Sources? I've switch between my 5s, M9...yes android and my 6plus multiple times.