I recently upgraded my Telus Nokia Lumia 520 operating on Koodo to an unlocked Nokia Lumia 635 purchased through the Microsoft store. I popped my existing Koodo prepaid sim into the new 635, set up the apn for data, and was good to go. I have been using the phone without issue for six weeks. Today I discovered that internet sharing is not working. I get the following: "Connection not shared. There's no cellular data connection to share right now. Check your cellular settings and signal, and try again." (Yes I have a data booster and data works) Now in the past I have used the access point application to ensure all settings were correct but that app is not working in this newer version of windows 8.1. Does anyone have any suggestions as to successfully turn on internet sharing?