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I don't see a usable possibility to have a static ip address with a mobile internet connection. The mobile device must give the RasPi a default route with its gateway. The gateway isn't static so you really should use DHCP. With Raspbian or Raspberry Pi OS accepting network settings from a DHCP server (your Android cell phone) is working out of the box with ...


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The same way you would with any other connection. Whether it would work depends on the device to which it is connected.


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User error :P Hub unplugged downstream. So my Raspberry Pi was connected to the a switch, that switch was connected to the wall jack, going to the network closet in the house. It was unplugged there at the router.


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If you have little control over the network from using the mobile access point, you can create a script to check the wlan you are connected to and set a route by putting the script in /usr/lib/dhcpcd/dhcpcd-hooks/ You can get the connected network from ifconfig wlan0 and the set the IP address etc within this script. In my mind, this is a little messy ...


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You tried to use /etc/dhcpd.conf. It may be a typo, but have you checked /etc/dhcpcd.conf (different from the one you mentioned)? If you have a static ip configured there this might explain what's happening here.


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Roy Marples maintains the dhcpcd network package and the dhcpcd-ui for config - details are here on his site. Maybe asking on the mailing list could turn something up if you do not want to fork/edit the code yourself? It may help others to edit your question to detail your needs a bit more (e.g. explain what you need it to do)?


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