What are all possible responses that maybe returned in the line_type field of the Phone Verification API response?
|fixed_line||A landline phone number. Not expected to be able to receive SMS messages.|
|mobile||A phone number associated with a mobile/cellular phone.|
|pager||A phone number associated with a pager device.|
|fixed_or_mobile||A phone number associated with either a fixed or mobile device.|
|toll_free||A toll-free phone number.|
|shared_cost||A shared cost phone number.|
|premium_rate||A premium rate phone number.|
|voip||A virtual phone number.|
|personal_number||A phone number designated for personal use.|
|uan||A universal access number, which can route incoming calls to different destinations.|
|voicemail||A phone number that is associated with a voicemail service.|
Note: Not all of these line types are returned for every country.