State of the art technology didn't pass by Peru completely. In Lima you find numerous public places with free Wi-Fi. Some hotels and hostels as well as bigger shopping malls, a few cafes and restaurants, especially in Miraflores and San Isidro, also offer this service to their customers. All Starbucks have Wi-Fi, most are free, but at some place...
As many Peruvians don't have their own computer or Internet access, you can find Internet cafes around every corner in Lima. Size, equipment and speed differ from location to location. But all Internet cafes offer at least surfing the net and e-mailing, most national and international calls via Skype.
Nowadays it is a near-necessity to stay connected and online at all times even when travelling or moving. In Peru, which has seen a tremendous development in mobile networks over the past years and today is one of the best in 4G availability in Latin America, that’s relatively easy.
At the end of February 2011, they introduced a new zip code system for whole Peru. While in the past only Lima and Callao had zip codes, now all cities and smaller settlements in the country are included in the new system.
The national Peruvian postal service 'Serpost' is much better than its reputation. Receiving mail in Lima and sending it from Lima elsewhere is quite reliable, while outside the capital it's less dependable.