GoTelVoip

GoTelVoIP is the official business calling app that extends your phone system beyond your desk to wherever you are. It brings the features of the GoTel VoIP platform directly to your iPhone/iPad. GoTelVoip helps make the desktop platform into a full unified communications service (UCaaS).

GoTelVoIP enables you to:
Make & receive calls from your business line
Transfer to another user or device without interruption
View active presence of other users
Record calls on demand
Mange contacts, voicemail, call history
Manage individual answering rules, greetings

All of this helps your business to deliver a great experience to their customers with GoTelVoIP.
NOTE: GoTelVoIP needs an existing account with GO Telecom https://www.gotelvoip.com/ in order provide service.