Develop module that handles international number validation

Will, are you thinking that number validation could be done based on the user's current country? (as reported by Country Code module or similar).

So, it would take numbers like "+447712123123", "00447712123123", "07712123123", "7712123123" and try to format them correctly using some common logic and some country-specific rules.

1. Strip any separator characters ("-", ".", " ", etc), but do not strip "+" yet.
2. Format the number:
   1. If a "+" exists first, then assume a fully-qualified international number.
   2. If an international dialling prefix exists (eg: "00") then it needs to separate the prefix (based on current country) from the international number.
   3. If a local dialling prefix exists (eg: "0") then separate this prefix (based on current country) and prepend the country code.
   4. If just a local number is specified, then try to establish whether we can handle it based on the current country rules.
3. Strip all non-numeric characters including "+".
4. Return international format number, eg: 447712123123

What's the current status/plans for international number validation? I saw that sms_international module was added and then removed.

Hi mfb,
The sms_international module still exists in the 2.0 branch. Completing a plan for this module and executing it should eliminate several issues and points of confusion with international number handling.

The function sms_formatter kills a lot of New Zealand numbers when it returns FALSE if the number is < 9. I needed to change this to < 7 to work for me. Also, by returning FALSE, it merely kills the number (the number that is then sent is just the country code).