First of all, many apologies for the your inconvenience.
Our new firmware version 1.53 has been fixed recent bugs from V1.52
Somehow, JNC version’s setup file didn’t updated properly.
Hence, JNC user may think it didn’t fixed or solved properly and they release it without test. But, it’s not true.
Everything has been fixed correctly now.
Please upgrade your firmware once more if you got the JNC iAUDIO 4 with V1.53.
Link is same as before.
Once more, many apologies for JNC users.
And, for JNC users please do not install other than JNC firmware.