UK carrier Three has revealed that Samsung's Galaxy S4 mini will not be getting the Android Lollipop update. The revelation was made by the carrier in response to a user's question on Twitter.
@barbs_paul Sorry for the delay in replying Paul. There's no plans for Lollipop for the S4 mini due to memory limitation. >DD ThreeUKSupport (@ThreeUKSupport) April 24, 2015
The reason, according to the carrier is the memory limitation on the S4 mini. When pressed further, Three also revealed they've received an official confirmation for the same from Samsung.
@YouMobile Hi there. Yes we've received confirmation from Samsung that this is due to a memory limitation with this device... ThreeUKSupport (@ThreeUKSupport) April 24, 2015
For those who aren't aware, released back in 2013, Galaxy S4 mini is a more compact, but also less capable variant of that year's Samsung flagship - Galaxy S4.