"WhatsApp can not open on my windows phone. Just says Resuming & goes back to main screen."
-User from Windows Central Forums
It's frustrating that you might miss some important messages when WhatsApp is not opening. When you meet this situation, you probably be strongly wondering how to fix the problem that WhatsApp is not opening on iPhone/Android. Fortunately, 6 proven methods are provided for you deal with the problem in this article.
As we all know, an update is designed to fix some glitches of WhatsApp such as WhatsApp not opening issue on iPhone/Android. Keeping WhatsApp always up-to-date is helpful.
Update WhatsApp on Android
Step 1. Open Google Play Store.
Step 2. Select My apps&games on the menu.
Step 3. Scroll down the INSTALLED list and find if WhatsApp is on the Updates list.
Step 4. Tap on WhatsApp, and then UPDATE, if it is available.
Update WhatsApp on iPhone
Step 1. Go to App store and choose Updates section.
Step 2. If an update for WhatsApp is available, you'll find WhatsApp in Available Updates.
Step 3. And then, tap on the UPDATE button.
Step 4. If asked, type your Apple ID and password.
You can navigate to System > Applications > Application Manager > WhatsApp. And then, tap on Force Stop. Next, turn off your phone and reboot your phone after few seconds. Then you can check you can open WhatsApp now.
On an iPhone X/8/8 Plus, you can tap quickly on Volume Up button>Volume Down button. And then, pressing the Power button for few seconds until the Apple logo shows.
On an iPhone 7/7 Plus, you cna press down and hold the Volume Down and Power Keys. And then, stop pressing when you see the Apple logo;
On an iPhone 6s/6s Plus or earlier, pressing Power and Home buttons for few seconds.
In most cases, WhatsApp does not open because of a weak or unstable network connection.Therefore, you can try to switch between mobile internet and WiFi to make sure WhatsApp is running smoothly.
Change Network on iPhone
Step 1. Swipe up Control Center from the bottom of the screen.
Step 2. Disable the Wi-Fi icon and tap on Cellular icon.
Change Network on Android
Step 1. Swipe down the menu from the top of the screen.
Step 2. Switch Wi-Fi from Mobile date.
Reset Network on iPhone
Step 1. First of all, open Settings and select General.
Step 2. Choose Reset at the bottom of the menu.
Step 3. And then, tap on Reset Network Settings.
Reset Network on Android
Step 1. Navigate to Settings, and then General Management.
Step 2. Select Reset network settings in Reset section.
Step 3. Tap on RESET SETTINGS button.
If WhatsApp still can't open, you are able to take care of this by deleting WhatsApp data and sign in again.\
For iPhone users
Step 1. Long press WhatsApp on home page.
Step 2. Tap on the delete button.
Step 3. Reinstall WhatsApp from App Store.
Step 4. Sign in WhatsApp again.
For Android users
Step 1. Navigate to Application on Settings.
Step 2. Choose Application>WhatsApp>Storage.
Step 3. Tap on CLEAR DATA button.
Step 4. Sign in WhatsApp again.
In order to ensure WhatsApp run smoothly, enough storage is essential. Shortage of storage might place negative influence on WhatsApp and lead to WhatsApp not opening problem. In this case, you'd better clear cache and free the space of your iPhone/Android.
You can uninstall some spare applications and delete photos and videos to free the space.
If you have an Android, besides clearing memory space, you can also clear cached data of WhatsApp to fix the misbehaving app.
Step 1. Tap on Settings.
Step 2. Select Storage & USB.
Step 3. Choose Cached data in Internal storage.
Step 4. Tap OK on the pop-up message.
Reinstalling WhatsApp might be an effective method to solve the problem that WhatsApp is not opening on iPhone/Android.
For iPhone Users
Step 1. Long press WhatsApp on the home screen.
Step 2. Tap on the delete icon. And then, redownload WhatsApp from the App Store.
For Android Users
Step 1. Go to Settings>Applications>Application Manager.
Step 2. Tap on WhatsApp from DOWNLOADED list. Tap on "Uninstall". Next, redownload WhatsApp from Play Store.
Before uninstall your WhatsApp, you'd better backup your data from WhatsApp so as to make sure you won't miss any important information. Fortunately, you are able to directly backup the data within the Settings menu of WhatsApp. What's more, FonePaw iOS Data Backup & Restore can help you to easily finish the backup of WhatsApp.
If you are having trouble of launching WhatsApp because it is not opening, just follow the methods above. And then, you definitely can find a perfect method to solve WhatsApp not opening Problem.
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