Questions about Ubiquiti UniFi VoIP Phone Executive

Since I have got no answer I tried again to connect Ubiquiti and after a half an hour got sy on the chat: this phone is only works with certain Ubiquiti switches ones?!) which support 48V 26W PoE+ 802.3.at which is according to my IT department unusually high voltage and wattage. Ubiquiti said NO power adapter or PoE injector possible. Their minimum recommendation is Ubiquiti US-8-150W now 223.- CHF at Digitec, (although it says 25.5W on Digitec's page and this phone would need 26W). This is totally _unacceptable_ to sell this phone without this information!

Meinst Du das? Ubiquiti UVP-PRO: Unifi VoIP-Telefon mit PoE

Hello and good evening I have just connected this device to the Swisscom account via Business SIP Credentials. Works perfectly. (Attention users with country code +41xxxxxxx) Have fun

According to the reply from doorbird.com, their app works on all Android devices with 4.3 and newer. The phone has 4.4.2 and should therefore work.