Good news for the Note4 in SEA(South East Asia) particularly in the Philippine region. The SM-N910C and the SM-N910G already received an OTA today, 13th of April 2015.(but on my case I received the update on 16th of April 2015 so they will be rolling up the OTA one step at a time)
Please note the OTA is about 1GB and takes like less than 30 minutes. for my experience (takes less then 30 mins FOR WHAT). Make sure you are connected to the WiFi before you download the OTA (unless you have much bandwidth data available on your mobile)
Go on and hit the Check now button in the Settings » About phone » Software updates menu. If the update has not already shown up on your device, use the firmware section to download the full firmware and flash it manually on your phone.
For the list of the Countries that have the OTA update please use the link below.
The New Enhancement is the Latest TouchWiz UX which is the same interface that Samsung installed into its latest flagship smartphone, the Galaxy S6.
The Latest TouchWiz UXwhich significantly uses less bloatware(40% less) compared to its predecessor, resulting in a lighter skin which is able to operate noticeably faster.
Despite the changes made to the icons, many will find them to be too cartoon, which is a criticism that will not bug off with this new iteration. Overall, the TouchWiz made a big step in the right direction which impresses me and certainly would be a good feed back for the other Note4 users.
Screen Shot of Android5.1(Lollipop) update.