Making international calls is different from traditional local calls. To call friends and family in Qatar, you will need to dial your current country code, then the Qatar country code, Local area code in Qatar, and then the phone number you wish to reach.
For example, if you are making a call from the United States to Qatar and you want to call someone in Qatar with the phone number 08035555555;
You will dial the United States country code, 011 and then the Qatar country code plus 8035555555. Alternatively, you can replace the country exit code (011) with (+).