Lebanon has joined a growing list of countries concerned about the use of Blackberry phones.
The country's Telecoms Regulatory Authority said it will assess security concerns about the device.
The move follows that of the United Arab Emirates which has threatened to ban some Blackberry services.
Saudi Arabia has called on telecom firms in the country to block the messenger function on Blackberry handsets from 6 August.
All three countries said that security concerns were behind the ban.