It's the 890 L, AC3200 Ultra, hardware version A1
I can't access the router page b/c it's in access point mode. Also can't enable or disable any features this way. But, this is the firmware file name: DIR-890L-R_REVA_FIRMWARE_PATCH_1.11B01.BETA01.ZIP It looks like it's a beta... maybe that's the issue.
2 neighbors near me, neither of them are connected to me. Both have comcast or verizon fios. My WAN connection is ADSL / copper. Which, I know, is ancient, but it's inexpensive and fast since we're near the base, it's good. Not great, but good.
I removed the additional small N access point we had the xbox connected to (ordered an xbox expansion card instead since we don't need another access point with the power of the AC3200's signal). That may have been causing issues, possibly?
I'm in the US, Maryland.
Thanks for answering!