If you try the search feature in the sidebar of this site you will see, under the “free gifts” drop down list a range of free gifts and incentives available with BlackBerry mobile phones.
Of these deals free laptop deals are amongst the most popular, due in part to the fact that laptops need upgrading on a similar timescale to contract mobile phones.
If you order a contract with sufficient minutes then you may be able to get a free laptop with your BlackBerry mobile phone, some sample deals are shown below:


BlackBerry Curve 8520, 50 minutes to any network and 250 texts. 100MB internet data per month. Priority Tickets and Priority Moments for all O2 customers.

Tariff Name: O2 50 Internet Basics (24m), Network o2, 24 Month Contract, 50 Anytime Minutes, 250 Free Text Messages, BlackBerry Curve 8520, Phone Price 230, Total Cost After Discounts £554
To determine whether these deals are good value try searching for the same deal in terms of minutes, texts etc, but order the search by the amount of cashback / instant cash available.
Then compare the amount of cash back you can get with your deal to the value / cost of the laptop being offered.
If the laptop being offered is worth less than the amount of cash on offer, then clearly, you would be better off taking a cash back deal and buying your laptop elsewhere. That said, often the free laptops offered with BlackBerry phones do represent good value, and are a convenient way of keeping all your mobile devices up to date within a single purchase.