Because of the ongoing Ossete-Ingush ethnic conflict, regional instability, and proximity to Chechnya, travelers should consider North Ossetia a war zone and tread very cautiously, event though it is safer than its eastern neighbors. Avoid going near the border to South Ossetia, as the border is guarded by extremely corrupt army officers on both sides. On a significant notation is that North Ossetia doesn't experience terrorism frequently.
mobile
In North Ossetia there are three GSM operators MTS,Beeline,Megafon, one 3G-UMTS operator Beeline and one CDMA 2000 operator on 450 MHz frequency SkyLink and they often have offers that give you a SIM card for free or at least very cheap. If you are planning to stay a while and to keep in touch with North Ossetian and other North-Caucasus people, then you should consider buying a local SIM card instead of going on roaming. If you buy a SIM card from a shop you'll need your passport for identification. It only takes five minutes to do the paperwork and it will cost less than $10.