Your SIM card will be linked to your account and any data you use will be added to your bill. You can’t buy a data-only SIM instead of a voice and data SIM. It’s an add-on, not a replacement.

And now there’s a new variant of it in the wild. What’s SIM jacking? This attack is called SIM jacking, where someone transfers your phone number to a SIM card in their possession.

Millions of mobile phones may be vulnerable to spying due to the use of outdated, 1970s-era cryptography, according to new research due to be presented at the Black Hat security conference.