It has one annoying bug this Note 4 despite few firmware updates. Once it lost the 3G/LTE signal, it cannot be enable back. Tried to turn on flight mode and disable it back. Sometimes it works and sometimes it doesn't.
Most of the time, I had to restart the phone.
Samsung Galaxy Note 4 Official Thread V6, 4th Generation Phablet by Samsung
Jan 7 2015, 12:39 AM
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