The simplest solution is to use one of Pepwave Access Points like the AP One Mini (http://5gstore.com/1/3516) or AP One (http://5Gstore.com/1/3172) - those solutions are plug-and-play and are built to work seamlessly with the Balance routers.
If you have a WiFi router you wish to use, most WiFi routers can be re-purposed to serve as an access point, but additional setup is required and that would not be covered by 5Gstore's tech support (we cannot assist with third party equipment).