It seems that any Android above 5.0 is having the worst time rolling out to even the newest of Android devices. When it comes to Android 5.1.1 Lollipop, it is quite slow when it comes to the HTC One M9 and M8. This also applies to Samsung devices like the Galaxy S5, S6, Note 4, Note Edge, and other devices waiting for have that Android 5.1.1 Lollipop Update Release Dates for carriers like Verizon, Sprint, T-Mobile, and AT&T.
The HTC One M9 and HTC One M8
According to International Business Times, HTC One M9 users on carriers like Sprint, AT&T, and T-Mobile should have received the Android 5.1 Lollipop last month, and so far, only Verizon is falling behind. So far, HTC has been pretty silent about the release of Android 5.1.1 Lollipop updates on the HTC One M9, the HTC One M8, and the HTC One M7.
It is entirely possible that the HTC One M9 and M8 could skip Android 5.1.1 and go straight to Android M. Mo Versi, the vice president for product management at HTC as well as unofficial breaker of Android update news, has stated that Android M will be coming to the HTC One M8. In other words, it could take a while before it gets here, just like it did last March when most of the carriers including Sprint, Verizon, and AT&T received Android 5.0.
Samsung Galaxy S5, S6, Note 4, Note Edge
As for the release dates for Android 5.1.1 in devices like the Samsung Galaxy S5, S6, Note 4, and Note Edge, the appraisal feels more optimistic as Gotta Be Mobile reports that Samsung is currently rolling out the Android 5.1.1 update out to the Galaxy S6, Galaxy S6 Edge, Galaxy S5, as well as models like the Galaxy Note 4 and Galaxy E5.
There are also reports that the Android 5.1.1 rollout has been really gaining a lot of steam. There is expected for the month of August to be a lot of details for those Samsung devices.
For example, you are going to hear a lot of pre-release details. One of the reasons for Android 5.1.1 is to fix bugs associated with Android 5.1, which was supposed to fix bugs associated with Android 5.0. It is possible that the reason for the delay with the Samsung series of smartphones has to do with security issues, and Samsung wants them truly patched up before approving the rollout. There are also reported problems with battery life issues, not to mention connectivity issues.
Another thing to expect is lots of rollouts of 5.1.1 updates. There should be one for the Galaxy Note Edge, and possibly some movement on T-Mobile's end. Unfortunately, that rollout isn't going to go to all carriers all at once. It will probably happen to a few, but I don't want to make any assumptions on which one will have it first.