Discover More Here. When it comes to purchasing telephones, there are two options that clients can select. To start with, the secured variant which cost less but which can be used with just one network can be bought by them. Customers are required to abide a particular contract for a certain time. Then there is the unlock variation which cost more but mobile owners possess a free choice of using any network in their setting. So, both versions have pros and cons also it is determined by the users whether or not they desire to buy that version or this version.