Cheapest Blackberry contract with BBM (for teen)?

Herongull

Consider Ovivo.

For free you get 100 minutes, 100 texts and 300mb each month.

For £5 per month, you can get 500mb worth of access to blackberry internet, messenger and mail.

http://ovivomobile.com/121/our-offer/blackberry/

NiftyDigits

If you had an O2 PAYG SIM for six months or more, you could go with them on a 12 month contract for £11 per month, including a Curve 9320.

Arcana

I've never hear of Ovivo before. Looks interesting. Free min. and text...woah.

Don't have a payg O2 sim, just a contract. And with no capping it probably wouldn't be a good idea anyway.