If you cannot receive incoming calls on your Oppo A37, you shouldn’t panic. There is usually a very simple reason and thus also a simple fix for this problem.

For example, many people accidentally turn on one of the silent modes that block callers from getting through to their phones. If that’s not the case, you might have diverted all your calls to a different phone number.
Let’s take a look at some of the most common call-related issues and the ways to deal with them.
Airplane Mode
You might not receive any incoming calls because you inadvertently turned on Airplane mode. Turning this silent mode off is one of the quickest fixes for this problem. Here’s how to do it:
1. Swipe Down from Your Screen
You can access the Notifications menu by swiping down from the top of your Home screen.
2. Swipe Left
Swipe left in the Notifications menu to access more options.
3. Check the Airplane Mode
If Airplane mode is on, the icon will be white. Just tap on the icon to disable Airplane mode.
Do Not Disturb Mode
Do Not Disturb mode is another possible reason why you cannot receive incoming calls. You need to take the following steps to disable it:
1. Open the Settings App
Once inside the Settings App, tap on No Disturb Mode to access additional options.
2. Toggle the Switches to Off
Tap on all the switches in the Do Not Disturb menu to turn them off.
Your Calls Might Be Diverted
If your calls are forwarded to another number, you won’t be able to receive them on your Oppo A37. This is how you can disable call forwarding:
1. Open the Settings App
Once you access the Settings app, tap on Call to get more options.
2. Access Operator’s Call Related Settings
Select Operator’s Call Related Settings in the Call menu to access call forwarding options.
3. Choose Call Forwarding
Tap on Call Forwarding in the Operator’s Call Related Settings menu.
4. Tap Always Forward
In the Call Forwarding menu, select Always Forward and tap on Disable. This action will turn off call forwarding on your Oppo A37. You should now be able to receive incoming calls again.
A Connection Error
There might be a connection error with your Oppo A37. The best way to deal with it is to restart the phone. Press the Power button to turn off the phone and then do the same to turn it back on.
Check Your SIM Card
There is a possibility that there’s something wrong with your SIM card. This is why you should remove the SIM card from the tray and inspect it for damage or flaws. After you remove the SIM card, you can also clean it gently. Remove any dust or particles with a soft, dry cloth and put the SIM card back in.
Get in Touch with Your Carrier
If none of the steps listed above worked, you should reach out to your carrier. There could be some network issues on their end that are preventing you from getting incoming calls on your smartphone.
The Final Call
A hard reset might be required for your Oppo A37, but only if all the methods included in this article fail to fix the issue. Before you proceed to do a hard reset, you should check the apps you have installed. Some of the third-party apps on your Oppo A37 could be blocking incoming calls. If that’s the case, you should do a soft reset first to see if it solves the problem.
Disclaimer: Some pages on this site may include an affiliate link. This does not effect our editorial in any way.