For connect IP phone via internet to OPTIROAM VoIP line, in your network internet must be support protocol sip and port 5060 and correct work of dns servers.
Download from the Google Play website or install it directly from the Google Play application or your device
click Google Play or scan the QR code.
click Zoiper Softphone by Securax Ltd.
click Accept & Download
Connect VoIP line:
click Add account
click and enter Account name, Host, Username, Password, Authentication user, parameters of connections for IP phone
click Codec Setting
activate uLaw и aLaw
after all change, click Save
click of name VoIP line, then click Activate
status SIP line is registered
click Dialer, enter caller number, click Call
Connect VoIP line via QR scanner:
click QR Scanner
A viewfinder will appear, position the phone so that the black and white barcode fits between the lines
Scan the code
fill in Nuber and Auth. Password from Parameters of connections for IP phone
Parameters of connections for IP phone
click VoIP Lines