Disable popups on cancelled Sprint service on LG G2

I have an LG G2, and recently got a cell phone provided for by my place of work, so I cancelled my Sprint service. I want to use the phone as a gaming device for my kids, but I keep getting error messages popping up regarding the fact that it cannot connect to the sprint network. > LTE : ESM-0 EMM-19 EHRPD : 5 MIP : 67 They pop up very frequently, and I cannot find a way to disable them. **TL;DR:** Is there a way to disable the popup error messages related to no service on a Sprint LG G2?