Is Myxer ringtones a safe site?

To check whether a site is legit usually, I do follow a simple checklist to see how well they do.

1) Use WhoisXY.com Whois Search to check the whois information and check whether the contact information matches with the one in the website. Some use private registration and hide their contact details but it is only to safeguard them from spammers and hackers.

2) In the domain contact details, is there a valid email address.

3) Is there a valid phone number visible, and does it work ?

4) Go through review about them using Unmaskparasites.com and check whether they are scam free.

I searched online and i couldn't find any valid source that it works with Verizon Cosmos.

its a safer