What can uniquely identify a phone? Phone number? IMEI? DeviceID?

Question

I'm making an application which demands each user be unique. I want to prompt the user at first launch for a username and then tie that to that phone in Firebase. I understand getting phone number is tricky and not the most wide of choices, is there any other unique identifier for a phone?

[Is there a unique Android device ID?](https://stackoverflow.com/questions/2785485/is-there-a-unique-android-device-id) — Sam, Dec 10 '17 at 21:34
https://developer.android.com/training/articles/user-data-ids.html — CommonsWare, Dec 10 '17 at 21:35

score 1 · Accepted Answer · answered Dec 10 '17 at 21:32

1

The IMEI is unique for every device so each phone has a different IMEI number. Phone number is not as reliable as they may change or be swapped.

answered Dec 10 '17 at 21:32

Berke Atac

156
5

Just thought id mention... like IMEI, The SIMs IMSI (International Mobile Subscriber Identity) can be used to tie the user to a SIM card, depends on what the OP is trying to achieve. – QuickPrototype Dec 10 '17 at 21:40

What can uniquely identify a phone? Phone number? IMEI? DeviceID?

1 Answers1