1. In Samsung S4 standby click on the "Apps" button, open into the details as shown in the following figure.
2. Then find "Settings" under the Open Interface.
3. Click "Connect" to open, you will see there is a "SIM card Manager" and then we click on it to open into.
4. Click on the "Data Services Network" and then you will see the following figure below.
5. At this point, if the "Home" is selected, then you are using a calling card called "Home" to surf the Internet, when you need to use another calling card to surf the Internet (take the call card called "office" for example), please click "Office" to switch the phone card called "office" to the Internet. (The calling card name can be modified for reference only.) )
All right, after we set it up, we can quickly switch the internet between the two via SIM card, of course, Samsung S5 can not set up this small series has not tested everyone has a mobile phone can try.