If you have entered abbreviated phone numbers (numbers without country or area codes) the PRS intelligently reconstructs the full (canonical) phone number before placing phone calls or sending SMS messages:
• | If the phone number has no country code the PRS Country Code option is used. |
• | If th phone number has no area code the PRS Area Code option is used. |
The PRS uses the following heuristics when dealing with abbreviated phone numbers:
1. | First all non-numeric punctuation characters are stripped from the number. For example +64(9)415-6259 will be converted to 6494156259. |
2. | If the number starts with two zeros it is assumed to be an overseas number and the two zeros are removed. For example 00-33-46428-4567 will be converted to 33464284567. |
3. | If the number starts with a single zero it is assumed to a local number; the zero is stripped and the number is prefixed with the country code. For example (025) 506 145 will be converted to 6425506145. |
Canonical Format
The phone number must start with a + character and include country code, area code and phone number. This format automatically takes advantage of the Windows Phone Dialer dialing rules. Phone numbers are entered like:
+<country code> (<local area code>) <phone number>
For example the Auckland (area code 9) New Zealand (country code 64) local number 415-6259 is +64(9)415-6259 in Canonical format.