I am using a cricket wireless modem, which apparently doesn't use a router. In-game, everything works fine for me and I get little lag, but my ping shows as over 200 all the time and people say that I glitch. Glitching as in moving around like I am teleporting almost.

Are you using cheat codes hacking it can start that it's kind of powers your ping a lot like me I did it (then got band from CS for 2 years) then my ping went to 49 to 700 serious