What do the options "Fax, Phone, Mail/Check/Money order" mean in the payment form?

All the three options are an additional way to use your credit card or, for mail/ckeck/money order, also to pay by check.

For “Phone”, “Fax” orders, you need to have your credit card number ready.

“Phone” option includes you calling a number provided by Plimus during the order process – based in US) and communicate your credit card credentials and the order reference number.

By “Fax” option, after filling the page with credit card details, you have to print and sign it, then fax it to the fax number provided by Plimus during the order process - based in US).

“Mail/Check/Money order” has two ways to pay. One by credit card, the other paying by check (or money order in US). After completing the payment, you have to mail all the details to the address provided by Plimus during the order process.