You need to buy 2 TMobile SIM activation kits -- like this: http://prepaid-phones.t-mobile.com/prepaid-phone/T-Mobile-Prepaid-Micro-and-Standard-combiSIM-Activation-Kit (probably cheaper on eBay)
You can access the website, but you can't use your phone number to do it. You have to use your username. But the password is the same. If you can access your online account you can pay online.
Ho Ho Ho Merry Christmas!
Tracfone Fuel also has unlimited carryover and has dual processors and Android Kitkat, so it's better/faster than Valet. Well worth $10.
Sweet ..hope ppl try it out