I'm currently using an iphone 5. If I want to upgrade to 5s are they going to pay for my old phone? I mean is there any offer or promotion that i can give my old phone + make small amount of payment for upgrade?
You can bring in your phone to Koodo and get a trade-in value for your iPhone 5. However, you will get better value for your existing phone if you sell it yourself (try eBay, Kijiji or Craigslist). Then use the money to purchase an iPhone 5S.
You can purchase the 5S on your Tab to reduce the price further.
You might want to try Best Buy as they often throw in a Best Buy gift card on trade-ins. Not sure if they currently do, but it's an option.
Here's where you can check the value you'll get--> http://www.bestbuy.ca/en-CA/trade-in-...
Not sure which iPhone 5 you have, but for the 16GB in good condition is showing a 200$ trade-in value.