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Learn how to use USSD code *#9900 on Samsung devices for system tasks. Important tips for advanced users inside.

Discover how the 4636 SMS service transformed communication in Haiti during the 2010 earthquake crisis.

Learn how to easily get a 773 area code number in Chicago from your phone service provider.

Learn to extend your phone's incoming ring time with a simple code for your carrier. Follow our guide for efficient setup!

Learn the quick methods to check your phone number code, including the use of the dialer app and phone settings.

Learn if *67 works internationally for hiding your caller ID and explore alternatives for secure communication.

Learn how to make emergency calls to 999 from your iPad using Wi-Fi calling and VoIP apps.