This product is either discontinued or we cannot get that from suppliers.
Yealink T55a SFB-T55A, 4.3 inch (480 x 272) capacitive touch screen, SILK speech codec, 1 USB 2.0 port, Bluetooth headset via BT40, Wi-Fi via WF50/WF40, Supports USB headset, Supports YHS33/YHS33-USB, Dual-port Gigabit Ethernet, PoE support.
The T55A Android-based phone not only features a 4.3-inch capacitive touch screen and the consistent Skype-tailored experience, but also owns the capability to upgrade to Teams version.