@phaft66
I quote and confirm what said by Genius3 above, no patch needed for Nüvi 24x5 / 25x5

Universal Firmware Patcher for Protected Garmin Devices

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FireFox58 Reviewed by FireFox58 on . Universal Firmware Patcher for Protected Garmin Devices Universal Firmware Patcher for Protected Garmin Devices v.1.10 This is an universal firmware patcher for protected Garmin devices. Many devices recently have a strong firmware protection and cannot use unlocked maps because firmware requires .gma and has MSV ( Map Signature Verification). In this list (http://www78.zippyshare.com/v/CWAOqHso/file.html) you will be able to check if your device firmware requires this patcher or if it just needs gingunlock+mapsigpatch or simply an .unl file Rating: 5