A few days ago Samsung Galaxy S5 devices from South Korea received a new update, so they got Android Lollipop installed, but in most countries the existing users are very nervous in expecting the Lollipop OS. Many rumors started to arrive from everywhere, but no source offered some certain release dates for each country or mobile carrier.
That's happening because it would be a high failure to offer the update to all countries in the same day - what would happen if one or a few major Lollipop bugs would cause big troubles? What would happen if a bug would block 30% of smartphones on first two hours after turning on your smartphone? Or... what would happen if the SMS function of your mobile phone will start sending a few tens of SMS messages from hour to hour (the mobile carriers stability would be seriously threatened).
So, that's one of the main reasons for smartphones get the new Android update at different days and not for all models in the same time: to be sure that all runs well, how it was planned, and to keep the customer satisfaction at high levels... Anyway, while in Europe the update will come until the end of 2014 for Samsung Galaxy S5 and Samsung Galaxy Note 4, in United States the update is expected in first half of January, 2015 (In US people are very demanding, and every minor bug could be a big trouble for Lollipop related to customer satisfaction).
Related to the new enhancements of Android 5.0 Lollipop, there are some improvements for battery life, the fingerprint recognition was enhanced, several native applications was redesigned, the smartphone performance was increased, new lockscreen notifications was introduced, etc.
