Push notifications

I want to add push notifications to my app, but I have an issue.
I tried to implement example from docs:

async function registerForPushNotificationsAsync() {
  // Android remote notification permissions are granted during the app
  // install, so this will only ask on iOS
  let { status } = await Permissions.askAsync(Permissions.REMOTE_NOTIFICATIONS);

  // Stop here if the user did not grant permissions
  if (status !== 'granted') {

  // Get the token that uniquely identifies this device
  let token = await Notifications.getExponentPushTokenAsync();

  // POST the token to our backend so we can use it to send pushes from there
  return fetch(PUSH_ENDPOINT, {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json',
    body: JSON.stringify({
      token: {
        value: token,
       user: {
        username: 'Brent',

But the function doesn’t continue after this line:

let token = await Notifications.getExponentPushTokenAsync();

No output, no errors. Android. SDK 15.0.0

What happens if you console.log the value of status? If you’re running this in a simulator, it probably won’t work.