Apple will make the iPhone 5 available in several cellular versions, potentially making it a headache for users who want to switch between carriers.
The phone will come in three different models, featuring two different kinds of wireless-access technologies -- a CDMA version and two GSM versions, according to Apple's specs page. The specs also show that the device will have to use a different SIM card than in the past .
Having several cellular versions makes the new iPhone a less compatible phone. Some countries use CDMA for cellular service, while others use GSM. The two different bands of GSM may mean even more compatibility issues.
The iPhone's new memory chip will be a nano-SIM card versus the previous device's micro-SIM card. The new phone won't be compatible with micro-SIM cards, according to the specs.
It's unclear why Apple chose these changes, but we have a message into the company and will update when we hear back.
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