Had a chance to get a pre-owned C2000T from a thrift shop. After performing a reset by reset button, and again by GUI it cleared the previous owner's info. However it populated the PPP credentials with the previous user's account when I did the "quick setup" with my log-in. It seems like it is being pushed into the modem through TR-69 based on WAN MAC or serial # through TR-69.
I repeated the process to make sure it was cleared and was able to duplicate it so it seems like there's something that references the previous owner's account with the serial # or WAN MAC. When I manually entered my PPP info through advanced settings, it sticks but I must wonder why the automatic setting causes previous owner info to get pulled and I have some concerns my account might responsibility issues.
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