List building Lead Generation - Mobile Number / Direct Number Research 1000 Mobile Numbers

We are looking for a detail-oriented freelancer to research and add reliable mobile numbers only where they can be verified for an existing contact list in Google Sheets. The work must be carried out carefully, with a focus on accuracy, relevance, and data quality. Only mobile numbers or separately direct numbers that can be confidently found and supported by reliable sources should be added. Please quote your cost per 1000 verified mobile numbers. This task is suited to someone with strong online research skills, good judgment, and experience handling contact databases. Applicants should be fluent in English, organised, and able to work methodically while respecting data quality and confidentiality. We will provide you the Google sheet for you to add only the verified Mobile numbers. We will initially do a Test of 20 numbers and if that is good , we will do a Paid test of 100 Leads