[Solved] Adding another phone to current plan

i currently have an iphone 3g, that is causing all sorts of problems, and i'm with telus atm, it was a 3 year contract and it still has 12 months left. currently i pay 58$ a month for a voice/data plan, now one of my problems is that, because of one of the issues with the phone, i had a 300$ phone bill last month, basically my calls kept dropping mid dial, but it can't be the service since my roommates phone works great(same phone), in the same area.

but i cannot call telus on my phone, since it keeps dropping, so i figured i'd get a replacement phone. now when i went down to bestbuy(no telus stores within walking distance) they said the cost to buyout or replace my phone would be 165$, seeing as my phone bill was 300$, i can't afford it.

so basically i want to know:
1. can i add a second phone to the same plan and just use only that phone?
2. how much of increase in my bill would i see?

i'm not sure how it works, but i'm not the type of person who gets angry or demands more from a customer service rep, its just not in my nature. i would rather take the easier route and replace the phone, then spend time yelling at customer service.

Note: reason i'm asking here is because i couldn't find any FAQ on their website