Ok , generally the blackberry phones require a data plan to get any data including emails. the carrier ( phone company)your using will unless you are using a pay per call plan or a minutes SIM card and do not have data included. It might be worth calling your phone company and asking if they restrict email data on your account or if you even have data included..
Carrier is a company like Verizon, ATT, T mobile
Z10 on BES
Z10 on BIS