If you can’t change the metered connection setting and want to, see Metered connections in Windows. If you have both types of data plans (one from your mobile operator and one from another mobile operator through the Mobile Plans app), you can switch between them at any time. Finally, the dual call type allows you to have calls on both lines at the same time. The phone indicates to you what SIM that call is coming from and you decide to take it or not. If you don't know if your Surface model is LTE or 5G enabled, the easiest way to find it is in the Surface app:

Cellular IoT SIM Cards - Alliot Technologies Cellular IoT SIM Cards - Alliot Technologies

With that system, your device does not use a SIM card. On the contrary, the device has an ESN (electronic serial number) so you cannot change your phone. To find this setting, select the Start button, then enter settings. Select Settings > Network & internet > Cellular > Use cellular whenever Wi-Fi is poor.To find this setting, select the Start button, then enter settings. Select Settings > Network & internet > Cellular > Let Windows keep me connected. Furthermore, if your dual phone allows two SIM cards, one of them is usually 4G speed and the other 3G or 2G speed. Say goodbye to constant high-speed internet. Worst case scenario, you will have a 4G SIM and the other SIM will work only for calls. Select the Start button, then select Settings > Network & Internet > Cellular > Advanced options> Add an APN. Appears when roaming and determines which cellular network connection is used. The default setting is Automatic.

Mobile Broadband | Data-only SIMs | from Vodafone

To learn more about using an eSIM, see Use an eSIM to get a cellular data connection on your Windows 10 PC. If you set a data limit in Data usage settings for your cellular data connection, Windows can help you stay under your data limit and set the metered connection setting for you. For more info about how to set a data limit, see Set your data limit. Likewise, if you are thinking about having a dual SIM phone, make sure that you know how it works and if it can be useful for you. You do not have to be in a rush to choose your communication tools. Exploration is the key. Please make sure that you know exactly what SIM Card size fits into your device. Most carriers introduced Combi SIM or Trio SIM which is basically a Nano and Micro SIM attached within a Standard SIM card. On the other hand, if you decide to pay for any data allowance, you can manage your social media and have access to online banking. This means that you can be enjoying the Italian sun while you pay your mortgages online.Explore our range of data-only SIM options to help you enjoy data on-the-go across a range of devices - such as your tablet, data dongle, or mobile WiFi device.

Cellular settings in Windows - Microsoft Support Cellular settings in Windows - Microsoft Support

To find this setting, select the Start button, then select Settings > Network & Internet > Cellular . Applies to: Surface Pro X, Surface Pro (5th Gen) with LTE Advanced, Surface Pro 7+ with LTE Advanced, Surface Pro 8 with LTE Advanced, Surface Pro 9 with 5G, or Surface Go 3 with LTE Advanced. If you don’t want any apps to be allowed to use cellular data, turn off Let apps use my cellular data . Apps won’t be allowed to use cellular data. They’ll only send and receive data when you’re connected to another kind of network. To find this setting, select the Start button, then enter settings. Select Settings > Network & internet > Cellular > Mobile operator settings. If your cellular data connection is working correctly, you shouldn't need to change the cellular settings. However, if you're having cellular connection problems, changing one or more settings may help.

For Surface devices that have both a SIM card slot and eSIM, select SIM1 from Use this SIM for cellular data to use your SIM. Learn more about your cellular data settings in Cellular settings in Windows. For example, if you are going to travel to Barcelona, Paris, and Amsterdam you could choose a European SIM card. International SIM Cards allow you to connect to the local internet network without paying for any extra roaming charges. You can have important services like chat, Mobile TV, games and more because the SIM Card does not necessarily need an internet connection.