Noticed the same thing after upgrading my mum's iPhone 5 (my old phone) earlier today. Strangely, only Settings > General > Usage shows iCloud Total Storage at 1.0 GB. If I tap on Manage Storage the little bar at the bottom still says "4.6 GB available if 5.0 GB on iCloud.
It's not subject to phone model, but there are differences in what's displayed depending on your carrier. For example, some carriers will display 4G instead of LTE, and some carriers will even give you both (like AT&T in the U.S., because their 4G is actually only 3.5G). On my Singapore telco, I don't even get the 2G option.

iOS 8.3 got lots of problem lah. it's not playing nice with a lot of apps and games. some of the issues i've encountered that never happened on iOS 8.2;

1. Chrome freezing. have to exit, clear from multitask and then enter
2. Games freezing and lagging (seems to affect games using Unreal Engine)
3. Whatsapp crashing
4. Stuttering at times (swiping)
5. no app access via external file manager (iFunbox, iExplorer, etc)

i'm using iPhone 6 and when i was on iOS 8.2, none of these issues occurred. i'm going to downgrade tonight.. if i had to choose between the 2G option and all of these problems, i'd gladly sacrifice the 2G option