[Discontinued] CyanogenMod 12.1 (Android 5.1) for Samsung Galaxy Express AT&T (SGH-I437)

This project has been discontinued!

I’m not going to develop this ROM any more. It takes too much time, and my phone is about to die, which means I’ll be getting a new one. Also, Android 5+ runs too slowly on this hardware. That’s why I’m currently using CyanogenMod 11 (which is back up at download.cyanogenmod.org). I advise you do the same. All changes I made are available on my GitHub.

I finally managed to build CyanogenMod 12.1 for the Galaxy Express! Yayy!

(the header image is still the old one, it hasn’t been updated with the new screenshots)

But it has bugs! Beware! Make sure you have back-ups!

If you’re looking for something more usable, try CyanogenMod 12. Also, make sure you read all the warnings and notices. It’s highly experimental.

Known bugs

  • Telephony does not work. SIM can’t be used.
  • Camera does not work. Camera app crashes right away.
  • Torch does not work.
  • Bluetooth does not work.

Not tested

  • NFC
  • Wireless hotspot
  • USB tethering (should work, please test)
  • USB mass storage
  • F2FS support
  • USB-OTG (host mode) – if it works, some extra ethernet cards should be supported

What works

  • USB connectivity (ADB, MTP)
  • SD card
  • Wi-Fi
  • GPU should be faster


This is for testing only! I take no responsibility for damages that can occur to your device! Make sure you read the old CyanogenMod 12 post before continuing!

Warning! The latest build hasn’t been tested. It may have more bugs or it may not. Try it and let me know. I have no time to test it.
  • CyanogenMod 12.1 (updated 8/18/2015) – MD5: c00a34c886840a466789850112e0e63a
  • TWRP recovery (recovery is from MultiROM, as I think it works better than the latest. Make sure you disable “Inject MultiROM” before flashing)

Please test and let me know what works for you through the contact form.

I’ll try to fix what’s not working. If you think you can help, please let me know!!!

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3 Replies to “[Discontinued] CyanogenMod 12.1 (Android 5.1) for Samsung Galaxy Express AT&T (SGH-I437)”

  1. Wow! I’m really bummed out to see that this is the end of the line for your work on these roms. I’m not that whiny guy who’s gonna say something ignorant, but rather say Congrats and THANK YOU!!! Sincerely for the hard work and effort, you’ve put into this, to this little expressatt an awesome little device to use, and experiment with. I’ve held on to mine all this time solely to follow along with the progression. So, Thanks again for kindly sharing your hard and seemingly dedicated work with us all, for I can say, I myself have greatly enjoyed it!!
    – Sincerely,
    Jeffrey C. 👍

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