Your protagonist has a phone. Heck, yeah, we all have phones. But your protagonist only needs “a phone”.
Cody reached into his pocket and pulled out his Samsung Uberphone ZX81 and…
No, no, no. And no. It’s a phone. Your reader will imagine it to be whatever phone they want it to be. But not if you tell them the make and model. They could even begin to despise the character because of the phone he or she is using, but mostly they just won’t care.
The same goes for tablets or e-readers. Either don’t mention the damn things or just mention in passing that Cindy was reading. Does it really matter to your story or plot whether Cindy was reading a paperback or on a Kindle? No, it doesn’t. Unless she’s being stalked by the Kindle Killer, in which case it’s essential that we know (or at least suspect) that she is reading on a Kindle.
But 99.9% of the time we do not need to know what make or model of electronic device a character in a book is using.