Nokia Lumia 820 - I cannot share my Lumia’s internet connection with another device

  1. Switch Battery saver mode off, or connect a charger to your phone: Tap Settings > battery saver > Off.
  2. Make sure that the operator mobile data plan subscription allows Wi-Fi tethering and your network operator has enabled internet sharing on the phone.
  3. Check the signal strength on the phone screen. To increase the signal strength, move around, or move towards a window if you are inside a building.
  4. Keep your phone in the idle mode, incoming or outgoing call will interrupt the data transfer until the call ends.
  5. Check the cellular data indicator (E, 2G, 3G, H+, 4G) at the left side of the phone's screen. Change the mobile network highest connection speed from 3G/4G to 2G and back again to make sure that your phone is connecting to the network correctly. Go to Settings > mobile network (or cellular).
  6. Make sure that the internet sharing security type (if not selectable, WPA2 is used) and password settings match between the connecting device and your phone (Settings > internet sharing).
  7. If possible, try to create a connection with some other device or force the connecting device Wi-Fi adapter to use 802.11g standard - disable 802.11n mode. On a Windows PC, go to Control Panel > Network and Internet > Network Connections, and right click your active Wireless Network Connection and open Properties > Configure > Advanced, then select 802.11n and set value to Disabled. Once ready, press OK.
  8. Connect again, as internet sharing switches off after 5 minutes of inactivity.