Capture cell phone or any information to mark user

Good morning,
Can anyone tell me if it is possible to capture the cell phone number that is opening my app.
I need to create a database with several companies, in the same industry, but only show the user the company they are registered with.
I don’t want him to choose between different companies to use.
I don’t want the user to register.
Thanks.

No, I don’t believe that is possible.
Glide has a “Device Info” column that allows you to capture various data points pertaining to the users device and browser, but certainly not their cell phone number. Even if you could, I expect that would be a huge privacy violation in almost every country in the world.

Given all those constraints, I’d say you are stuck.

Tanks.

How do they “register” though? How would you determine which company a logged in user is tied to?