Q: If I took my sim card and put it in another iPhone, would that phone now work w my number???

Yes, assuming the phone you put the sim in is either unlocked or locked to your current carrier.

Only if the "other"  iPhone was not carrier locked to a different carrier

Then yes it will work.

Then switch, no issues.

YOu would have to contact your carrier and ask them to unlock the phone.  Thats if your carrier offers unlocking.

Slip152r wrote:

 

How do I unlock carrier, I put the sim in and not working

call the carrier it is locked to to check they offer unlocking and the terms

Quoted from your second post:

"It's my daughters phone. We are all on the same plan/ carrier"

If that's true, you don't need to get the phone unlocked, all you have to do is swap sims.

You would have to erase the phone - settings - general - reset - erase all contents and settings - this will wipe the phone clean.

then you can restore that phone from your backup.

Settings>General>Reset>Erase All Content & Settings. When finished, set it up however you like.