There is a bug making the Jiayu G2F phone freeze (hang). This project has a remedy and includes a modified version of boot.img fixing that bug.

WARNING: This applies only to Jiayu G2F WCDMA model with 1Gb RAM, 4Gb ROM, Android 4.2.2, kernel 3.4.5, build G2FW-20141027-W-R-V0.3.6. No other models were tested!

Phone frequently freezes (hangs) without any visible reason.

Every couple of seconds a new instance of memsicd3416x service is spawned while the old ones are still continue running. This obviously leads to resource exhaustion and system freeze.

The oneshot option is missing in the init.rc file where memsicd3416x service is started.

DISCLAIMER: ABSOLUTELY NO WARRANTY, DO IT AT YOUR OWN RISK.

Just flash your phone's boot partition with already modified and provided here boot.img using the fastboot tool from the Android SDK:

fastboot flash boot images/modified/boot.img

Get a copy of your phone's boot image, extract it, unpack initrd.cpio.gz, modify init.rc file according to the diff below. Then repack it back to the new initrd.cpio.gz, and then write your own new modified boot image. Flash the resulting boot image to your phone's boot partition.

The diff:

diff -Naur original/rootfs/init.rc modified/rootfs/init.rc
--- original/rootfs/init.rc 2015-10-22 22:41:58.406635561 +0300
+++ modified/rootfs/init.rc 2015-10-22 22:41:48.970914550 +0300
@@ -1317,7 +1317,8 @@
 #

 service msensord /system/bin/msensord
-    class main
+    oneshot
+ #   class main

 service s62xd /system/bin/s62xd
     disabled
@@ -1339,9 +1340,10 @@

 service memsicd3416x /system/bin/memsicd3416x
      disabled
+     oneshot
      user system
     group system
-    class main
+ #   class main

 service akmd8975 /system/bin/akmd8975
     disabled

The modified boot image was found at http://www.mediafire.com/download/avcudzc753254tb/JY-G2F-W-kernel-changer-to-0.3.6b.zip.

This boot image also fixes a bug with magnetic sensor service (msensord). See http://4pda.ru/forum/index.php?showtopic=584280&view=findpost&p=40437370.

https://github.com/android/platform_system_core/blob/jb-release/init/readme.txt