What E.164 means
E.164 is the international standard for phone numbers. It starts with +, then the country code, then the national significant number. BLAH! phone accepts numbers you type in national or international form, but showing the full +country format removes ambiguity.
Dropping the leading zero
Many countries use a leading 0 on national numbers (trunk prefix). When you dial internationally, omit that 0 after the country code. Example: a UK number 020 7946 0958 becomes +44 20 7946 0958—not +44 020.
Mobile vs landline prefixes
Large countries often split prefixes by carrier or number type. BLAH! phone quotes the rate for the digits you enter, so double-check the full destination number. If the rate looks unexpected, confirm you included the correct area or mobile prefix.
Saving contacts for family abroad
Store numbers in +E.164 format in your contact book. That way you can paste them directly into BLAH! phone, reuse them across devices, and avoid subtle misdials when calling home from different countries.