After updating your iPhone, it is possible that the baseband firmware which controls your cell signal got corrupted. You may see an alert on your phone that says that the cellular update failed, or you may see a message in your cellular settings that says an update is required to use cellular data on your device. This can be frustrating to deal with, but this article will walk you through some basic troubleshooting and then an advanced solution if all else fails.
If you have a SIM card containing contacts that you want to put on your iPhone, this is easy and only takes a few minutes.
First, make sure that the SIM card you have will fit into your iPhone. To find out which size SIM card you can use with your iPhone, check out Apple’s support page.
Now, if you know the card fits, here’s how to import the contacts from that SIM card to your iPhone.
Do you need or want to change your iPhone SIM PIN? Maybe you entered the code from your cell phone carrier and want a more secure SIM PIN or were able to create one yourself and just want to change it now. Either way, it takes just a few minutes.
Here’s how to change the SIM PIN on iPhone.
If you’ve got a stack of old, deactivated iPhones laying around without SIM cards like I do, then you’ve probably become very familiar with iOS’ inherently annoying ‘No SIM’ alerts. Not only does iOS display “No SIM” in the Status Bar, but it feels the need to display Lock screen banners and pop-up alerts to remind you of the obvious not just twice, but three times in a row.
As a jailbreak enthusiast and jailbreak tweak reviewer, I use deactivated and SIM-less iPhones all the time, and I’ve come to loathe these No SIM alerts. Fortunately, a jailbreak tweak called NoSimAlert by iOS developer SparkDev can help tremendously in this department.
As of today, customers in the United States can get a brand spanking new iPhone XR, fully unlocked and unassociated with any carrier, by purchasing a full-price SIM-free variant that's now available from Apple retail and online stores, as well as from wireless carriers.
Support for the electronic SIM (eSIM) standard has been uncovered from the first developer beta of iOS 12 which released to Apple's registered developers eight days ago.
For this year's iPhone launch, Apple will be offering SIM-free models of the Xs and Xs Max on day one. This means you will not be forced to pick a carrier when ordering either of the two new handsets, and can instead choose to activate them on the [compatible] network of your choice, at your leisure.
Wireless carriers China Telecom and China Unicom have begun promoting a rumored dual-SIM feature for new iPhones ahead of tomorrow's “Gather round” iPhone Xs event keynote.
The rumored 6.1-inch next-gen iPhone with dual-SIM feature may be exclusive to China, according to Taiwan's Economic Daily News. Citing sources within Foxconn, the outlet reports that the rumored model is "regarded as a unique model" to the mainland market.
Find My iPhone is a great way to secure your iPhone in case it is lost or stolen, but it doesn't do much to protect your SIM card. Indeed, without a PIN enabled on your SIM, anyone with access to your SIM card can use it to make phone calls, send messages, and use cellular data.