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.