CAN I PUT ATT SIMS IN IPAD FOR FLEA MARKETS ETC. NO WIFI BUT I HAVE SIMS FROM MOBILE NETWORK

[TRIPPERDALE]

CONNECT WITH MOBILE SIMS IN IPAD

[RHatch]

I have done it with a Verizon sim and it works.  Just need to have a sim that fits.  Some iPads and phones use a different size sim.  You could also try using your phone as a hotspot.