It turns out this problem has come up for quite a few iPhone users, and there isn’t a single universal fix because the unnamed, password‑less “network” usually isn’t a normal saved Wi‑Fi entry. In most cases, it’s being injected from somewhere else, which is why it survives resets.
Here are the causes that other users have traced it to:
• A configuration profile or MDM
If the device has ever had a work, school, VPN, or Wi‑Fi configuration profile, it can silently add networks that can’t be removed manually. Checking under Settings → General → VPN & Device Management and removing any leftover profiles has solved it for many people.
• Carrier‑pushed Wi‑Fi settings
Some carriers automatically add Wi‑Fi networks for features like Wi‑Fi calling or hotspot offloading. These networks don’t show names and can’t be deleted by the user. Switching SIMs or contacting the carrier has cleared the phantom network for some.
• A corrupted Wi‑Fi entry in iOS
A few users reported that the unnamed network only disappeared after updating iOS or doing a full restore through a computer (Finder/iTunes). A full restore rewrites the firmware more deeply than an on‑device reset.
• Not actually a saved network at all
In some cases, the “network” is just a broadcast artifact from a nearby router or device with a blank SSID. iOS displays it oddly, making it look like a saved network even though it isn’t stored on the phone.
Did anyone ever find a guaranteed fix?
No single solution works for everyone, but the most successful ones have been removing profiles, updating iOS, doing a full computer‑based restore, or resolving carrier‑pushed Wi‑Fi settings.