Phone Numbers

Top-level utilities handle Tanzania phone validation and normalization.

Function	Description
`NormalizeTZPhone(string)`	Converts `0712345678`, `255...`, `+255...` to E.164 `+255...`; errors on invalid numbers.
`IsValidTZPhone(string)`	Returns `bool` — validation without an error.


phone, err := sendafrica.NormalizeTZPhone("0712345678")
// phone == "+255712345678"
 
if sendafrica.IsValidTZPhone("0712345678") {
    fmt.Println("valid Tanzania mobile")
}

Accepted formats

Format	Example	Result
Tanzania local	`0712345678`	Normalized to `+255712345678`
International with `+`	`+255712345678`	Passed through
International without `+`	`255712345678`	Normalized with country code

Tanzania mobile prefixes are 071–078, 068, and 069. The same logic runs inside SMS.Send — invalid numbers fail local validation (ErrInvalidPhone) before any network call. International destinations must be present in GET /v1/rates to be billable.