Or even better, take out the SIM and find to whom the number is registered to. In many countries numbers require registration, ie. you can't get one without showing personal papers. Of course intel agencies aren't required to do that, so that if you can't get a real name for that SIM then you're 100% sure you're being watched by people a bit more powerful and dangerous than your suspicious wife (unless your wife works for them :^).
Using cellphones or anything related to them, especially if you don't plan to recover the device, is not good for spying because you're leaving behind tracks almost as important as DNA.
Nice article though. If some of you want to experiment with these devices, you can get a SIM800 or A6 GSM modules then pair it with a small uC for a lot less than €10.
>If you can't get a real name for that SIM then you're 100% sure you're being watched by people a bit more powerful and dangerous than your suspicious wife
If you conveniently "forget" or show heavy reluctance to give your info and papers when buying a new phone, you can get an unregistered SIM. Just promise them you'll give the info "later". The salespeople don't like the hassle and just want to secure the sale.
You can also easily give fake info and "forget" your ID card, since it's not verified, but that's dangerous if you get caught.
