Sir,
Experienced web research freelancer here. Ready to start working :-)
We will search the phone numbers and verify comparing several sources on the web (YP, whitepages etc.). However, we won't call them as it would cost money to us, and moreover I think it's enough to verify the numbers by searching online.
Please let us know what info you will provide, for the businesses in addition to their business names and phone numbers?? Such as address, country etc.
Can complete the task in 2 days, still I requested for 3 days.
Ask me questions, if any.
Sincere regards,
Jubair
eSolutions