Apple started to know about mobile network more in its new update iOS 9.3 Beta 3

Apple introduces wifi call from American service providers

Apart from that it took iOS 9.3 Beta 3 for Apple to understand differences between LTE/4G/3G

  Minute GUI glitches were solved in this new update some of them are listed below

In iOS 9.3 Beta 2 while searching network bar & search bar use to get over lap

In iTunes Music icon still gets disappears like you can see in this one

There is no icon above “My Music”