Hi there, johnclinton131,
After reviewing your post, it appears you're facing a few issues with your iPhone 6s on iOS 10.2. WhatsApp and Hike aren't notifying you that you have a message. Assistive touch stops working but starts again after locking and unlocking your phone. And, the battery life of your iPhone 6s isn't lasting as long as you expect. I'll be happy to help you with these issues.
Background App Refresh
Does whatsapp need background app refresh ? What kind of common apps actually need/don't need it ? -- Kilgore-Trout has some good insight into Background App refreshing. You should also check the notifications on your phone. If you're using notifications within WhatsApp and Hike, you'll need to contact the developer for help.
Assistive Touch
If the screen on your iPhone, iPad, or iPod touch doesn't respond to touch
Adjust your settings for 3D Touch
If you have an iPhone 6s or later that isn't responding properly to 3D Touch presses, you can adjust the settings:
- Go to Settings > General.
- Tap Accessibility > 3D Touch.
- Then adjust the sensitivity of the setting.
Battery Life
About the battery usage on your iPhone, iPad, and iPod touch -- You can use this article to determine which application(s) or service(s) are using the most power.
Maximizing Battery Life and Lifespan -- This article contains great general and specific steps you can take to maximize your iPhone's battery life. Don't neglect Tips for iPhone, iPad, and iPod touch for steps specific for your iPhone. After you apply any step, test your iPhone's battery for a bit and report back your findings.
Let me know how that goes and thanks for using Apple Support Communities!
