G6 and new iPhone

I had to get a new phone and now when I try to have it recognize my transmitter, it says it is not found. I’m manually entering the transmitter from the old phone. Do I need to remove the transmitter from the sensor and re-insert it to have it recognized? I haven’t deleted the app from the old phone yet because I’m concerned that I won’t be able to get it to work on the new phone.
Any info or links or suggestions will be greatly appreciated.

Only 1 phone at a time.
If you don’t want to remove the app from the old phone then change the transmitter id on the old phone.
Both are not allowed to connect at the same time.


Thank you