5 Replies Latest reply: Nov 2, 2013 4:28 PM by tmo_keith_m RSS

LG G2 wifi calling error ER05 "invalid SIM"



I bought the phone yesterday, arrived home and connected my wifi network. Everything is up and running, except for the wifi calling that is giving error ER05 "invalid SIM".


i reviewed online and followed the steps to have wifi calling for the LG G2. These steps were indicated in the following URL: Wi-Fi calling: LG G2 | T-Mobile Support .However, I still have the same problem as before.


Can anyone indicate what the issue could be or what I am missing.


I am able to do the following without issues:

  • connect using wifi
  • Connect using 4G
  • Make regular calls
  • Receive SMS