Should I put my old SIM card in my new phone?
Regardless of the device you're switching from, don't switch your SIM card until the entire transfer is complete. Before you get started, you'll also want to make sure both your old device and your new device have at least 20 percent battery life.Feb 25, 2022
How do I know if my SIM card is activated?
If the old sim is the same size use the old sim. Use the old SIM, save the new one to use as a spare. This is particularly handy if you travel overseas, because if your phone is lost or stolen, T-Mobile won't ship you a replacement SIM overseas.May 5, 2020
Why is my phone not reading SIM card?
The best way to see if the SIM is active would be to insert it into a device which has a compatible SIM card slot. The good news is inserting any older SIM card into a phone will not harm the phone in any way or change any of the settings.Jan 31, 2017
When I get a new iPhone do I just switch the SIM card?
Open Settings > Mobile Network. Under SIM Card info and Settings, Tap the SIM, and toggle on “Enable”. Also, make sure the data roaming is ON to avoid this issue when you're in a roaming area. When you face the issue of “SIM Card not detected”, clearing out cache data could prove an effective solution.Oct 21, 2020
Why won't my SIM card activate in my iPhone?
Since your SIM card is essential to get network connectivity on your device, you must transfer it to your new iPhone. The process is pretty simple and you can even get your contacts with it.
How do I get my iPhone to recognize my new SIM card?
Restart your iPhone. If you're using a cellular-data connection, connect to a reliable Wi-Fi network instead. If you get an error message on your iPhone that says the activation server is temporarily unavailable or cannot be reached when trying to activate, wait a few minutes, then repeat the previous steps.Dec 13, 2021
How do I activate my new SIM card?
Go to Settings > General > About. If an update is available, you'll see a prompt to select OK or Update. Remove your iPhone SIM card or iPad SIM card from the SIM card tray and then put the SIM card back.Sep 23, 2021