Use a CradlePoint Wireless N Portable Router your way.

The CTR35 converts a 4G or 3G USB Data Modem into a secure 16-connection wireless network.  It can also use traditional Cable/DSL Ethernet-based modems to create ~350-feet of WiFi.  Or use existing WiFi to create a secure connection with an unsecure public hotspot.

CradlePoint routers are built to work with the most popular 4G/3G USB Modems from wireless operators such as:  AT&T, Bell Canada, Clearwire, Cricket, Rogers, Rover, Sprint, T-Mobile, Telus, US Cellular, Verizon Wireless (Alltel), & Virgin Mobile.   

See "Supported Devices" for the current list of supported modems.

WIRELESS or WIRED INTERNET ACCESS
Enables internet access through 4G/3G wireless broadband networks, existing WiFi, or Ethernet -based data services ( Cable / DSL / Satellite ) 

Supports most wireless data modems from the leading carriers ( modem and service sold separately ) 

Special Feature:  Use WiFi as a Data Source

FLEXIBILITY
Configurable   Designate the Ethernet port as “WAN Mode” and create a WiFi hotspot from a wired internet connection. (Cable/DSL) 

Pass-Through VPN Connection Support    Enables a laptop with a VPN client to create a secure tunnel to corporate networks.  (IPSec, L2TP, PPTP) 

Network Failover Support    When using a wired internet source (DSL/Cable Modem) connected to the Ethernet port, the CTR35 will detect an internet outage and switch to an attached 4G/3G data modem. 

TIP:  Use your CTR35 + 4G/3G modem to back up your home network when not traveling.