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Hardware compatibility

Warning: Flashing your router may void its warranty. Flashing your router with inapropriate firmware can "brick" your router. WorldSpot takes no responsability about this.

If you don't feel comfortable about flashing your router, then you shouldn't. WorldSpot.net can provide preflashed routers.

Before trying to flash your router, there are some things you need to know.

You should first visit openwrt.org hardware compatibility page. Please read carefuly your specific router page from the compatibility table. If the router is supported by openwrt backfire (or previous versions), there are good chances that worldspot firmware will work.
In this router page, there are precious informations about how to recover your router after a bad flash. Some routers models can easily recover from a bad flash, because they have a flashing procedure which does not involve the firmware (bootloader flashing). If such a procedure exists for your router model, then it should be safe to try WorldSpot firmware. You should even try flashing WorldSpot firmware using this recovery procedure.
If you don't have such a recovery procedure, then risks are higher in case of a bad flash. Recovery is often still possible by opening the router and connecting an appropriate serial cable. Serial cable procedure should be detailed in the openwrt.org page specific to your router.