“If your iPhone is locked to a particular carrier, it can be truly frustrating,” Ashleigh Macro writes for PC Advisor.

“Some iPhones will only work with a SIM card provided to the carrier they’re locked to – O2, EE or Vodafone, for example,” Macro writes. “But there are other ways to unlock your iPhone so that you can use any SIM card.”

“Some iPhones are easier to unlock than others, depending on the carrier and the phone’s circumstances,” Macro writes. “Most iPhones purchased within the past year or two will actually be unlocked already, but if your iPhone is older, your mobile phone provider may be able to unlock the phone for free, or you might find that you’re able to unlock your iPhone yourself.”

“Unlocking your iPhone is completely legal if you purchased the device unsubsidised or have finished paying for your contract,” Macro writes. However, if you’re still paying for your contract, you technically don’t own the iPhone yet, so you really should check with your carrier before unlocking it.”

Read more in the full article here.

MacDailyNews Note: More info via Apple: How to unlock your iPhone.