> 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/haeufig-gestellte-fragen-und-antworten-zu-multisim.md).
# Frequently asked questions and answers about MultiSIM
To use multiple devices with one plan, you can book additional eSIMs or SIM cards through your account. You then use one phone number, booked data volume, and the voice flat rate on multiple SIM cards.
How can I book additional SIM cards?
➔ As an admin, click in your account on **My telephony** and **Telephony**.
➔ As a user, click on the left in the navigation on **Telephony**
➔ Next, click on the top right on **Add device**.
➔ Select **Mobile device** and click on **Continue**.
➔ Assign a name, an icon and choose whether you want to use telephony or the internet.
➔ Now select **Activate eSIM** or only **Activate SIM card** and click on **Continue**.
➔ If you activate the SIM card: Enter the **SIM card ID** and **activate** it.
➔ If you activate an eSIM: Select whether you use an **Apple iOS device** or an **Android device** use.
➔ Scan the **QR code** with your smartphone and wait for the **activation** to complete.
What is automatic data top-up?
Under **My telephony** you can under the menu item **Mobile network** manage your data options. With automatic data top-up, the data volume is automatically replenished as soon as it has been used up. Automatic data top-up applies up to four times a month. You can decide whether to turn off automatic data top-up or use an additional 500 MB or 1 GB. Unused data volume expires at the end of the month.
Which devices are additional SIM cards compatible with?
The additional SIM can be used in any device that has an eSIM or a SIM card slot. The product range extends from smartphones to tablets, notebooks and smartwatches, all the way to IoT devices.
Can I use the Apple Watch with additional SIM cards?
No, the Apple Watch is currently not usable on sipgate's network.
How much do additional SIM cards cost?
Additional SIM cards cost €4.95 gross per eSIM or SIM card per month. In the first month, a SIM is charged pro rata after activation.
Who can book additional SIM cards?
Both admins and users can book additional SIM cards. When additional SIM cards are activated by a user, the account admins are informed by email.
Can I book both eSIMs and SIM cards as additional SIM cards?
Yes. When booking additional SIM cards, either an eSIM can be activated immediately or a classic free SIM card can be ordered.
Can I book different data volumes for my additional SIM cards?
No, the additional SIM cards are always linked to the data flat rate of the main SIM.
What can I do if I need more LTE data volume?
To book additional data volume, users can order 500 MB data snacks for €4.95 at any time. They only need to send an SMS with the content 500 to the number +495555. Once 80 percent of the data volume has been used, the affected users will also receive an SMS with all the information about the data snacks. If the LTE data volume is regularly not sufficient, the account admins can book a larger volume (max. 10,000 MB) for the relevant users at any time. This data volume is available immediately after booking.
Can I also make calls via additional SIM cards?
Yes, with the additional SIM cards you can make incoming and outgoing calls. For outgoing calls, the phone number of the main SIM is always displayed.
Can I also receive SMS via additional SIM cards?
You can individually determine with which of the created mobile devices you want to receive SMS messages.
Can additional SIM cards be deactivated?
No, deactivation is not possible. Additional SIM cards remain linked to a data volume until they are deleted by users or admins. Immediately afterward, they can no longer be used. After deletion, no further monthly costs are incurred.
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