> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/cloud-telefonanlage/en/using-sipgate/mobilfunk/erste-schritte-im-mobilfunk-von-sipgate.md). # First steps in sipgate mobile services First steps with sipgate mobile services – activate SIM card, set up device, and make mobile calls. With sipgate you can make calls not only in the office or at home, but also on the go in the sipgate mobile network. What do you need for that? A mobile-capable phone and a SIM card. To set up your mobile phone for mobile service with sipgate, you first need to create it in your account under **Telephony** in the routing overview. You can choose whether you want to activate an eSIM or a physical SIM card for your mobile device. Information on setting up your device can be found in the help center article [Configure smartphones, tablets & co.](https://help.sipgate.de/hc/de/articles/360020432378). {% hint style="success" %} For your information: All SIM cards as well as shipping are **free of charge**. {% endhint %} It is best to check beforehand whether your **mobile phone** is eSIM-capable. If so, you can **eSIM** activate with a click on the button. Now specify which type **mobile phone** you would like to use and follow the instructions on the screen. If you need a **physical SIM card** you can order it in advance in your **account management** under **Contracts & Products** order, click there on **Order SIM cards**. The other way is via the item **Activate SIM card** when creating the mobile device described just now, after which you either enter your existing SIM ID or order a **SIM card** can. #### Book mobile numbers To use your **mobile phone** with the SIM card, you can either route an existing phone number to the device or use or book existing mobile numbers. You can choose between a block of 3, 10, or 100. How to assign mobile numbers can be found in the article [Set up account](https://help.sipgate.de/hc/de/articles/360020149618-Account-einrichten) below. #### Set caller ID from the mobile phone On your **mobile phone** you have the option, just like with a phone, to set your caller ID individually. To do this, under **My telephony** click on the menu item **Telephony** and select your desired mobile device. Now you can click on the menu item **device settings** in the expanded menu and set the caller ID there. **Important**: The set caller ID is applied to all devices within a device group When you make calls abroad, your sipgate number is usually shown instead of the number you assigned yourself - we have no influence over that. For SMS sending, the following applies: You can only set caller IDs that are stored in your account. If you set a number as the sender that is not in your account, a number from your account will automatically be set as the sender when sending SMS. If caller ID is suppressed, the sender is “sipgate”. #### The sipgate mobile network sipgate operates its own core mobile network within the Telefónica Deutschland network. We only use Telefónica's cell towers - we developed the actual technology behind it ourselves. So you make calls and surf in the sipgate network. #### Book a plan and make calls abroad The [Prices and plans page](https://www.sipgate.de/preise) listed under basic functions, the DE all-network flat rate covers all calls made from the sipgate landline network. Anyone who also wants to use the benefits of the all-network flat rate with their mobile device must book it additionally for mobile service. You can make calls in all countries of the European Union with your sipgate SIM card. Use of your SIM card in non-EU countries is partially possible. The prices for use in non-EU countries as well as the list of countries in which the SIM card works can be found on our [website](https://www.sipgate.de/alletarife#mobilfunk). **Activate and deactivate call waiting on the mobile phone** In many cases, call waiting cannot be set or switched off directly on the device, but must be configured manually using a key combination. Dial \*43# ➔ dial key to activate call waiting Dial #43# ➔ dial key to deactivate call waiting Am I also reachable under my extension?\ Yes, even when on the move, your colleagues can reach you under your extension. Reachability via extension by SIM\ To reach another person from the sipgate account via extension, simply dial the extension number followed by an \*.\ If you want to call extension 10, enter **10\*** and start the call. **Important**: Forwarding to an extension padded with zeros is **not** possible. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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