samsung galaxy tab a connects to free wifi instead of home router

[AC Question]

when I turn on my tablet, it connects to a free wifi from a nearby store instead of my home router. why?

 

[Mr Mendelli]

Depending on your router and it's password, may be having adverse effects on your device. On my old router, I was unable to use asterisks. When I did, my device would connect, disconnect with an authentication error, then auto-connect to the nearest xfinity WiFi hotspot. Some routers don't support special or unicode characters.