
[Note, this forum isn't letting me post links, so I'll try try abbreviating the url's]
I guess there's no update on this issue?
I have the same issue with a mystery connection "5099251212", was do apparently many many others, yet nobody has any solid answers
I'm running Android 9 on a Samsung S8+ (originally from carrier Bell Canada).
I did find a vague mention of this in a research paper (pdf attached) about malicious networks, but i'm not clear on whether it was implying that this specific SSID is a concern.
From the pdf:
"We are able to accurately evaluate unique devices using the UUID-E value as the unique identifier. We filter for any instance where the device sends a directed probe, retrieving the SSID value for each. Sorting by most common occurrence the top three most common SSIDs were BELL WIFI, 5099251212, and attwifibn. The SSIDs BELL WIFI and 5099251212 are used by the mobile carrier Bell Canada for seamless WiFi offloading."
(I cant find anything backing up that statement.)
Numerous others have made(vague) mentions of this, such as:

github.com/BramBonne/privacypolice/issues/40

forum.xda-developers.com/t/cant-forget-5099251212-and-bell_wifi-networks-on-lg-g4-virgin-mobile-canada.3518058

arstechnica.com/information-technology/2017/04/wide-range-of-android-phones-vulnerable-to-device-hijacks-over-wi-fi
This is probably an unrelated coincidence, the the telephone number 509-925-1212 is apparently registered to someone named "Mohamad Hussain" of Kennewick (near Tacoma in Washington State....while both me and my phone ahave always been Canadian... But probably irrelevant anyway.)
When searching for that number I aIlso saw several references to "Karma Attacks" but again (as far as I can tell) nothing concrete either way. (Karma, aka "Evil Twin" attacks, are a method of opportunistic Man-in-the-Middle attacks, often via public wifi hotspots)
Wikipedia: wikipedia.org/wiki/KARMA_attack
SOMEONE, somewhere, knows for sure what this is all about! ... But whom?!
Does anyone have any further insight?