Open adb and
adb shell [enter]
mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system [enter]
cd /system/etc/security [enter]
mv otacerts.zip otacerts.zip.old [enter]
adb shell [enter]
mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system [enter]
cd /system/etc/security [enter]
mv otacerts.zip otacerts.zip.old [enter]
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