If SIM is switched out, it should just go to voicemail providing you have voice mail service. It's the same as having your phone turned off, or out of juice.
You can save numbers to your SIM card, it means that if you switch phones, the number will go with the SIM and not be on your old phone. The thing to be careful of is syncing. If you sync the numbers from your SIM onto the phone, it will be on the phone.
You have iphone 5s, so it's more of a pain because you need a paper clip, or a piece of metal to remove the SIM tray. You can get a SIM opener keyring to make it easier. Alternatively, get a phone where you can switch it out by removing the battery at the back, or one where it's a pressable dock (e.g. Galaxy Note 10.1)
Other than that, not much else to consider. The alternative is to get a second phone and keep it on offline or flight mode when you don;t want to use it for texting or calls. e.g. I have 3 devices on me most of the time, 1 phone for the super camera, 1 phone for apps, and a tablet. | |
