anyone wanting to dial long distances, a carrier code needs to be keypaded first, then the city code and phone number - popular carriers include 21 for embratel, 31 for oi and 23 for intelig

if an individuals dials 031, city code then phone number the call will be directed through a different carrier - 21, 23 and 31 all route the call through different carriers - to dial international long distance you need to dial  0021 or 0031, country code, city code  then local phone number.

you can call collect long distance by dialing 90, (021 or 031), city code then the local number - generally it is not possible to call collect internationally - the dialing rules form private land lines are the same as the ones listed above - local cell phones are available via four carriers, vivo, tim, claro, oi and nextel - More information on carriers in Rio can be found here LINK TO EXTRAS PHONES.