<prompt> Human: So I currently owe 1620 0 interest for 18 months. However I have a 10 off coupon and I was planning on buying a 500 phone making it 450. If I was planning on paying it off immediately on my cycle.Will I pay any interest on the 450?Here is some chats between me and the representative.  <response>: If you owe 1620 already it doesnt make much sense to buy a 500 phone. 0 promo periods are best used to get out of debt, not as an excuse to buy more things you cant afford. 