Grumpy Old Geeks Topics One phone number across devices Topic One phone number across devices 2 mentions in 1 episode A planned carrier feature that would let several devices share a phone number. Mentions 132: Achtung Grumpy Oct 16, 2015 18:41 AT&T announced, and now T-Mobile has followed up 18:58 You’ll be able to share a single phone number across multiple devices