# Phone number formatting

Learn about the utility tools provided by Sinch that help with correct phone number formatting.

The phone number should be specified according to the E.164 number formatting ([http://en.wikipedia.org/wiki/E.164](http://en.wikipedia.org/wiki/E.164)) recommendation and should be prefixed with a `+`. For example, to verify the US phone number 415 555 0101, the phone number should be specified as `+14155550101`. The `+` is the required prefix and the US country code `1` prepended to the local subscriber number.

The Sinch SDK provides APIs for parsing and formatting phone numbers. The primary class for this functionality is `SinchPhoneNumberUtils`. A key thing when parsing user input as a phone number is the concept of *default region*. If a user enters their number in a local format, the parsing must know which region / country to assume. Example:


```swift
// Get user's current country Iso by carrier info
let defaultCountryIso = SinchPhoneNumberUtils.defaultCountryIso
```

Important!
When passing a number as a `String` to create a `Verification` object, the string should contain a number in *E.164* format.

A number that has been typed can be formatted as *E.164* by using `SinchPhoneNumberUtils.formatNumberToE164` method or `e164Number` property of `PhoneNumberUITextField`.