Finally bought my first tablet. Its an 8 in. HP 8 G2. Its an entry level Android Kit Kat 4.4.2. Quadcore A33. 16 GB of memory. I added a 32 GB micro card.... My son has a 10 in. Nexus witch is about 2 1/2 yrs old with the latest version of Android which is 5.0.2 Lollypop....My question is.... Why doesn't my new 8 in. update to what his older 10 in. has?