Get connected wherever you are with the T-Mobile E3131 Pay As You Go Mobile Broadband Dongle. Online access By paying up front with this USB (Universal Serial Bus) dongle, you can get online to check emails & browse the web instantly. Without any commitment, you get 90 days of internet access, after which you can pay per day. Handy dongle This reliable pocket-sized E3131 dongle can be carried anywhere & works by simply plugging into the USB (Universal Serial Bus) port on your device. This USB (Universal Serial Bus) Mobile Broadband stick is also ideal for swapping files between PCs, Macs & phones using the micro SD card slot which takes up to a maximum of 8GB. Get connected with the T-Mobile E3131 Pay As You Go Mobile Broadband Dongle.