I have been testing SFOS 2.1.3.7 on my Gemini PDA for a little over a week now as my main OS.
I finally got SFOS flashed (e.g. hanged in tutorial - not able to swipe back from gallery app). But now I can't see any phone settings, no mobile network selection nor SIM subfolder in Settings. No signal strength indicator either. And yes, I have working SIM card inserted and funtion in Android side.
SFOS 2.1.4.14 / 0.0.1+master.20180425220752.e3d6f1b.1 (reported by SFOS About product).
Image Gemini_x27_12062018 dowloaded 25.6.2018 from http://support.planetcom.co.uk/partitionTool.html
I have x27 version, and dual boot with 16GB Android / 40GB Linux split.
BR - Wille
Sorry to hear that, it seems like a number of users are having a few issues with the SFOS 2.1.4.14 image.
I have yet to flash and test that one out myself so hopefully you get it or find someone who has been testing that image.
You may try looking in to the SIM setup, on my device I can select between SIM 1 and SIM 2, defining which SIM slot to use for data and SMS.
Everything going fine on the 2.1.3.7 install still so I am currently focusing on developing apps and misc scripts for myself at this point.
If you get it working and have any specific fixes let me know!