I'm curious about why a SIM card is necessary for setting up a Wi-Fi hotspot on my phone. I came across a message that says, 'No SIM card. Insert a SIM card to use Mobile Hotspot and other tethering options.' I have a Samsung Galaxy S23 Ultra running Android 13. Can someone explain this?
5 Answers
For most phones, a mobile hotspot uses cellular data. You need a SIM card because it connects to the cellular network, which is essential for creating the hotspot. You can't share a hotspot without that connection!
It's all about using your mobile data! When you create a mobile hotspot, your phone takes its cellular connection and turns it into a Wi-Fi network to share with others. No SIM card means no mobile data, and without mobile data, you can't set up a hotspot.
Typically, Wi-Fi hotspots rely on cellular data for their internet connection. If you want to share an internet connection that your phone is already using, like Wi-Fi, you can usually do that through Bluetooth or USB instead of a hotspot.
Some phones can share their Wi-Fi connection over a hotspot, like my Pixel 6, but your S23 Ultra might not have that capability. It really depends on the device.
A Wi-Fi hotspot basically lets your phone share its internet connection with other devices via Wi-Fi. To do this, you need a SIM card (or eSIM) because that's what connects your phone to your cellular network. Without it, your phone doesn't have any cellular data to share, so no hotspot for you!
Exactly! Some newer phones can share their existing Wi-Fi connection over a hotspot, but not all. Just check if yours supports this feature.