
One quick way to check if your iPhone is connected to the internet is to open Safari and try to load a couple web pages. Try turning the switch off and back on, which can fix a connectivity glitch.

Make sure the switch next to Cellular Data is on. If you're using Cellular Data, open Settings and tap Cellular. Try toggling the switch next to Wi-Fi off and back on, as this can sometimes fix a minor connectivity problem. Make sure a blue check mark appears next to the name of your Wi-Fi network. If you're using Wi-Fi, open Settings and tap Wi-Fi. The first thing to do when the Mail app won't load emails is check your iPhone's connection to Wi-Fi or Cellular Data. Emails won't load on your iPhone if it isn't connected to the internet. Is Your iPhone Connected To The Internet?
