I believe every persons experience is different because BB does not have a clue what they are doing.. At least they didn't.. I would hope they know by now but on friday I get screwed out of my Note 4.. I had a blackberry to trade in and was one of the first people in the door at 10 am to pick this beauty up.. had it activated and already was starting to set it up when they asked for the trade in and after running around a bit and bringing over a couple of managers they told me that since my blackberry is worth $0.00 that they can't accept it.. They told me it had to be at least $0.01 (1 cent) to be qualified for the $200.. I told them that i talked to 2 other representatives and a samsung guy before I even preordered the device to make sure this was indeed ok and they all told me it would be fine. Got no where and they had to return the device and I wasn't buying it unless I got the $200.. I had an iphone 4 to trade in in case the blackberry wasn't going to work earlier in the week but I sold it once they told me the blackberry would work.. So I called BB customer service and was hootin and hollerin and they called the store and talked to a manager (this manager wasn't in the store when I was there yet) and then let me talk to a manager and he apologized and told me that the other employees didn't realize that you could skip that section and the next section would indeed let you trade it in.. So I was ready to go back in and buy it when he told me that they had to return the device after it was activated so now I can't buy that device and it had to be sent out. So they didn't have any other black Note 4's for AT&T so I had to order it again and have to wait to get it in which who knows when that will be.. I was bent but oh well.. Hopefully sometime this week it will be in.. That is my story.. If they tell you they can't take a phone that is $0.00.. they are wrong.. now if the phone is damaged or has water damage of some sort then idk what they will do.. probably not accept it.. good luck.. hope this helps other people..
ps.. sorry for the length