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              Open source router firmware project OpenWrt ships its own entirely repairable hardware
 
            
            (www.theregister.com)
          
          This is a most excellent place for technology news and articles.
GL.inet has some LTE routers with OpenWRT on them. I haven't tried the LTE version, and the one (Shadow) I have has to be rebooted once a week, but that's a really cheap one I was trying.