They seem to be a pretty legit supplier. They have been online since 2001. I checked the net for scam stories or complaints against them but fortunately didn't find anything serious.
To start dropshipping with this company you must first register, during registration they require a Company name and resellers/sales tax ID. They accept safe payment methods . They carry some of the most sought after mobile phone brands.
Although we cannot guarantee their trustworthiness as a supplier since we have not had any personal experience using this supplier.
But all the same - I do hope this helps. :) All the best!