James Bond uses a Sony Xperia Z5 mobile phone in SPECTRE.
The phone can briefly be seen in the Aston Martin DB10, when Bond calls Moneypenny while being chased by Hinx. It's not 100% confirmed if Bond uses the Z5 or the smaller Z5 Compact.
James Bond (played by Daniel Craig) uses a Sony Xperia™ T mobile phone in the movie SkyFall. In a bar in Shanghai, Bond receives a text message with Patrice's flight number. The text message, received at 19h55, from an unknown number, reads: "EWA FLIGHT 226 9pm".