Possible types of GLS phone numbers.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/enums/gls_phone_number_type.proto)

| Enums ||
|---|---|
| ## `DESTINATION_PHONE_NUMBER_FOR_ADS` | Provider-provided destination number to use for calls originating from a GLS ad unit. This is the default. |
| ## `DESTINATION_PHONE_NUMBER_FOR_SMS_ONLY` | Destination phone number that supports SMS. |
| ## `DESTINATION_PHONE_NUMBER_FOR_WHATSAPP_ONLY` | Destination phone number for a provider's WhatsApp account. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |