If you mistakenly enter your SIM cards default PIN, or mis-enter your own PIN when unlocking the device after a reboot too many times, your SIM card may get locked. For now, if you use a Verizon iPhoneeither the iPhone 4 or 4Swe dont recommend setting a PIN youll need to wait for another solution to prevent your phone from potentially falling victim to the iMessage issue. The Verizon iPhone 4S does contain a SIM card, but reports from around the Web suggest that changing its PIN wouldnt help at best (because in normal use, the SIM card doesnt send data to the network the same way that it does on the other carriers), and can cause problems in some cases.
The Verizon iPhone 4 doesnt have a SIM card at all, so this workaround cant help with that phone. If youre on AT&T or Bell Canada, its 1111. If you havent set one yet, you need to know your carriers default PIN. But heres the rub: Its not asking for your new PIN rather, youre being prompted to provide your current pin. Slide the SIM PIN slider to On.Īt this point, the iPhone will prompt you for a PIN. On the Phone screen, scroll down and tap on SIM PIN. Heres how to change your SIMs PIN to avoid the potential iMessage problem, without incurring the SIM PIN pain we just alluded to.įirst, on your iPhone, launch the Settings app, scroll down, and tap on Phone. Worst of all, if you make a mistake one too many times while changing the PIN or unlocking your SIM, you can end up locking yourself outand at that point, only intervention from your carrier can help you.
And you usually need to know your carriers default PIN before you can set a new one. There are a couple reasons for that: The iPhones interface for setting a new SIM PIN is rather awful, as well explain in a minute. If you lock your SIM with a PIN and your phone ends up in the wrong hands, youre more protected: After a remote wipe, the phone will restart and prompt the new owner to enter the SIM before the phone will accept new iMessages (or FaceTime calls) at your old number.īesides the potential added annoyance of needing to enter your PIN code whenever you restart your iPhone, theres one other potential downside to locking your SIM: Its the tiniest bit risky.
It specifically locks your SIM, and youll be prompted to reenter the PIN whenever you restart your iPhone. Such a PIN SIM is separate from an iPhone passcode that you may have set.
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