Algeria offers good telephone and internet coverage.
It will not be difficult to buy a local sim card in one of the many mobile phone companies’ outlets. On arrival at Algiers airport there are shops of the retailers Mobilis, Gezzy and Oredoo where you can buy rechargeable sim cards for a few Euros, but you must register by presenting your passport.
To call Italy you will need to dial the international dialling code +39, and to call Algeria from Italy +213.
Wifi is available in almost all hotels, and a broadband internet package can also be activated on the phone sim.
Only in the south in some areas around Tamanrasset is there no telephone coverage. And totally without coverage is Tadrart, which is not necessarily a bad thing.