"activate notifications" is a correct and usable expression in written English.
You can use it when asking someone to turn on notifications for a certain application or website. For example: "Please activate notifications for our website so you can be notified of any updates."
Tap "Activate Notification Service," and on the new screen, select "Accessibility" and then tap on "Just once".. Tap "SpeedUp Smartwatch," which is initially turned off, to enable it.
While you're in there, activate account activity notifications so that every transaction sends a text or email confirming that fact.
Paolo would like to encourage other schools to activate Elements notifications; the emails have been very successful in the School of Medicine.
Foursquare, the location-based social networking service, is about to activate Push Notifications in the new version of its iPhone app, due shortly.
You can also specifically send a question to a real user, and activate push notifications to alert you to when a new answer has arrived.
I saw a glitch or two along the way — it took a few resets before my SIM would activate, the notifications bar seemed to crash twice, the camera app felt a bit shaky at times… but things like that are all part of the deal with a brand new phone from a brand new team, and I've already seen them issue patches.
Users may activate error notifications of varying stringency on the fly, and use these messages as a guide toward a consistent, syntactically correct model.
Checking the box next to "Ongoing notification" will activate a temperature notification in the device notification bar.
When you've made an order a notification pops up from the Amazon app on the device you set up the Dash buttons with, but you can and probably should activate that notification on every device you own.
