Dash + looping on iPhone

Hi all! I’m currently using Dash and I’m waiting for an appointment next week with my Dr. since I will start Looping.

The problem is I have an exam to take next month and I won’t be able to carry any devices with me (nor my iPhone) to the test room. Will I stop receiving insulin (my basal) if my phone is not near me when I start looping?

I know the Dash (PDM) doesn’t stop giving you basal, but does a phone stops when you’re looping? If so, I might consider using the PDM for the day of the exam (is it easy to go back from looping to the PDM just for the day)?

I hope I explained it clearly, and thanks in advance!