using your blackberry with playbook

i have just got a playbook and been loving it since day 1 and i like how u can bridge ur blackberry phone with the playbook.. i Have notice that when i bridge my phone with my playbook it uses up alot of my data on my phone plan.. does anyone else agree and is there a way that i can bridge my phone snd not use so much data.. any suggestion greatly appreciated

Find wifi.
Do less.

if you are not any place that has wifi you are going to need to use your data, no way around it.

bridge your playbook with a strangers blackberry