releasePhoneNumber
inline suspend fun PinpointSmsVoiceV2Client.releasePhoneNumber(crossinline block: ReleasePhoneNumberRequest.Builder.() -> Unit): ReleasePhoneNumberResponse
Releases an existing origination phone number in your account. Once released, a phone number is no longer available for sending messages.
If the origination phone number has deletion protection enabled or is associated with a pool, an error is returned.