One Number

One Number is a Chrome extension designed for users of Telekom’s One Number mobile radio option, letting you control which phone number appears on outgoing calls. Whether you want to show your company's landline or personal office number, this tool helps business partners recognize you instantly while keeping your mobile number confidential. You can also customize contact-specific settings to show your mobile number for friends or family. Ideal for travelers and professionals wanting to maintain a consistent, recognizable presence on phone calls, One Number enhances your communication flexibility and privacy.

To use One Number, ensure your Telekom mobile radio has the One Number option activated (more at www.telekom.de/one-number-app). The extension values user feedback to improve and provide a seamless experience. Enjoy managing your phone identity effortlessly with One Number from Telekom!