VoIP Phones - zoiper
You can download a part-configured Zoipier from here:
Configuration instructions for Android and iOS
You can purchase Zoiper here: https://www.zoiper.com/en/shop/buy/zoiper5
If asked about MWI, you can select Disable.
This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!