[Galaxy S 4 i9505 Original Android Development] TabletGeek:
Clean ROM install feedback

Terrific ROM JDCTeam!

This JDC AOSP ROM has brought new life to my GS4 with smooth performance and no *major* issues.

Working uniquely well (vs. issues I've experienced with other CM13-based ROMS):

Bluetooth connection (phone, audio, contacts sharing)

Wireless charging

Cellular and data (LTE) connections (no erroneous "SIM card inserted" messages, no dropped calls)

No random reboots

A few minor issues I've experienced:

Cannot connect to any 5 GHz hotspot (does not appear in scanned Wi-Fi AP list)

GPS tracking seems to be less reliable

Battery life "acceptable" but less than CM13

I am just beginning to really use my phone with this ROM now but it is definitely working much better than any other MM-based ROM I've tried for my GS4. I will provide updates if I notice anything unusual.

My build data:

Phone: Samsung Galaxy S IV (SGH-M919)

Baseband: M919UVUFOK3 (upgraded from MDL after ROM install))

ROM version: 20160208

Clean install (wiped System, Data, Cache)

GApps Package: Open GApps mini (downloaded 2015-02-11)

Did not change kernel (from what was included with this ROM)

No system modifications

Xposed not installed (yet)

Converted data and cache partitions to F2FS

Note regarding F2FS conversion: When attempting to convert multiple partition's filesystems to F2FS using TWRP, if you receive an error similar to "Invalid partition", do not panic. I got around this by converting partitions individually (i.e. select only one partition for conversion each time).

For those devices that are experiencing dropped calls, random overheating, unexpected messages such as "SIM inserted" and "network unavailable" (when in an area of good cellular coverage): Check your baseband (modem) version. I had all of these issues when using the original MDL baseband. However, all these issues were resolved after upgrading to NK2 (and then later OK3) baseband (modem.bin file only). I am currently running MDL bootloader with OK3 baseband and all seems to work well. Instructions for flashing a new modem.bin file can be found elsewhere on XDA and on the web but...

Note to Mac users: If you are using a Mac to flash a new baseband, you will probably want to use the software Heimdall (similar function to Odin for Windows). However, I highly recommend uninstalling Kies before attempting to use Heimdall. The USB conflict between Kies and Heimdall resulted in a soft brick the first time I attempted to update my modem, as the modem.bin flash was interrupted at approximately 90% complete. To reduce risk, I finally used Odin (running Windows under Parallels) and this worked well.

...a lengthy post but hopefully it is helpful.

---------- Post added at 03:02 AM ---------- Previous post was at 02:51 AM ----------

+1

I confirm the same issue with being unable to see or connect to 5 GHz networks. My phone, baseband (M919 / OK3) and other information are identical except I performed a clean install. My phone connected to the same 5 GHz APs prior to changing ROMs. A similar issue has been reported regarding 5 GHz tethering but this appears to be a separate (possibly related) issue. I am not attempting to tether... simply attempting to connect to a 5 GHz wireless router.