Buying a local SIM card is the best way to access the local telephone network.
Mobile-phone coverage extends throughout most of the country (bar a few remote, mountainous areas). Check with your mobile provider before leaving home whether you'll have roaming service in Lebanon.
Local SIM cards
Local Touch and Alfa SIM cards are widely available from phone stores, cost around US$35 (including some credit and data), are activated immediately and can be easily recharged.
The country code for Lebanon is 961, followed by the local area code (minus the zero), then the subscriber number. The area code when dialling a mobile phone is 03 or 70. The international access code (to call abroad from Lebanon) is 00.