Phone number porting is the process of moving a telephone number from one provider to another or from one type of service to another (e.g. private hosted cloud, hosted VoIP or on-premise SIP), but staying with the same provider. ISDN to SIP is the most common porting process. There is also porting between SIP providers and from other resellers within the same SIP provider. 1) What You Need to Do There are various paperwork and …
