Thread: Nuvi 58LMT "can't unlock maps".

I've got a Garmin nuvi 58LMT which worked flawlessly until a couple of days ago. I used Garmin Express to update it as I'd done many times before, no errors reported.

After disconnecting the device it seemed to take longer than usual to power up. When it did I get a message about no detailed maps available and then that it can't unlock maps.

I've done some research into this.

Reinstalling maps doesn't help. Everything seems to work fine but same error.

Factory reset: nope same error.

I switched the device from MTP to mass storage so I can see the hidden .System folder. Wish I'd known about that before so I could back everything up.

Internal storage says 5.55GB free so it's not full up. Added a 32GB SD card (FAT32) just in case. It's visible but no data is written to it when I reinstall the map.

Only oddity I can see (which may be nothing) is that myMaps on the device give me one option "CN Europe NTU 2026.20 Foursquare" and Garmin Express reports "City Navigator UK & Ireland 2026.20" maps (I'm in the UK).

Chat with Garmin support said basically "it's a brick have a discount on a new one".

I suspect it's a misconfiguration or a corrupted file but not sure what to try next.

Any ideas?