This is the least working method to fake your caller ID.
A virtual number, also known as direct inward dialing (DID) or access numbers, is a telephone
number without a directly associated telephone line. Usually, these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers, chosen by the client: fixed, mobile or VoIP. A virtual number can work like a gateway between traditional calls (PSTN) and VoIP.
Subscribers to virtual numbers may use their existing phones, without the need to purchase additional hardware, i.e. use the numerous available software.
A virtual private number is a telephone number that forwards incoming calls to any of a number of pre-set telephone numbers. These are also called a follow-me number, a virtual telephone number or (in the UK) Personal Number.
Usually a virtual telephone number can be set to forward calls to different telephone numbers depending on the time of day and the day of the week using time of day routing for example, between 9 and 5 on working days incoming calls will be forwarded to one's workplace, but in the weekends to one's cellphone.
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