Because of its proximity to the conflict in Chechnya, the security situation is very poor in Stavropol Krai. While kidnappings are unlikely, there have been fairly regular bombings of public areas and official facilities in the southern cities and in Stavropol over the years. While a visitor is fairly unlikely to be victim to such terroristic attacks, the resulting crackdown has led to strict and unfortunately corrupt policing of the area — a visitor is quite likely to be harassed for bribes.
mobile
In Stavropol krai there are three GSM operators MTS,Beeline,Megafon, one 3G-UMTS operator Beeline and one CDMA operator on 800 MhZ frequency RusSDO 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 Stavropolean and other North-Caucasus,South-Russians 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.
talk
Russian is the soup of the day.