It's not prepaid but webguard is disabled. It appears that T-Mobile made the decision to block access to the site for purely political reasons.
It works on Verizon and AT&T. I can only access through a VPN on my device currently. T-Mobile and it's subsidiaries are blocking the site.
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes.
Sorry, our virus scanner detected that this file isn't safe to download.