Chip required for InStore Transaction?

[ganzeny]

Hello!
I just have a quick question that may be stupid but I just wanted to make sure I'm not purchasing useless dumps. I bought dumps with service code 201 thinking that using the chip was optional. What I mean by this is, when I would go to a POS I could just swipe the card and it'd work, but it doesn't, it says my sale was declined. The reason I ask this is because out of frustration, I went to Taco Bell to get food after my failed attempts to purchase any merchandise. I used the card, BOOM, it worked, their chip reader wasn't functional.
Sorry for the story, I wanted to provide background on what was happening. My question is: Should I attempt to put the information on a blank chip card and try again? Is not having the chip the reason why my transactions are being declined? I'm assuming that if I try with a chip it'll work because at Taco Bell it cleared because the chip reader was non-functional.
If you need any more information I will try my best to provide it, as always, any information is helpful. THANK YOU!