I recently took advantage of the Lunar New Year promotion and have just received my sim card. Upon inspection, it looks like the sim card has some sort of smudge on the gold side. I have tried wiping it off, but to no avail. I am thinking since it was mailed to me, it may have been mishandled while being sent, or the cold temperatures may have potentially damaged it.
I have set up and ported over my phone number from a previous provider (Rogers) and I have internet access, but when I was speaking to my girlfriend on the phone, the quality of the call was very poor and low quality. (I am in the GTA so I should definitely be covered). Could a damaged sim card affect call quality? Should I go in store and get a new sim card?