I have bought a Samsung Galaxy On7 G600FY (o7lte) — not to confuse with the Samsung Galaxy On7 Pro G600FY (o7lte). It has a Qualcomm SnapDragon 400/410 chipset.

My goal is to get rid of the awful TouchWiz and run Lineage OS 14.1 on it, but the On7 is not an officially supported device. After hours and hours of searching Google I can’t find even an unofficial build on xda-developers.

Here’s what I’ve done:

• Installed a custom TWRP recovery.
• Made a full TWRP backup of the original system.
• Tried to install this unofficial, supposedly stable On7 ROM, but upon trying to flash it, I get the following message:

E3004: This package is for device: o7prolte,SM-G600FY,G600FY,on7prolte; this device os o7lte.

How do I get Lineage OS 14.1 on my device?