Gigaset GX290 (GX290) / Volla Phone X (yggdrasilx) for eOS-S 3.1.4
e-3.1.4-s-20250922-UNOFFICIAL-GX290.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/Gigaset/GS290%20GX290/e-3.1.4-s-20250922-UNOFFICIAL-GX290.zip/download
e-3.1.4-s-20250922-UNOFFICIAL-yggdrasilx.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/Gigaset/GS290%20GX290/e-3.1.4-s-20250922-UNOFFICIAL-yggdrasilx.zip/download
Please see sources and install instructions including recovery here:
https://get.libremobileos.com/devices/GS290/builds
https://get.libremobileos.com/devices/yggdrasil/builds
Use it at your own risk!
Please support the developer(s)!