If you consider to buy the iPhone 6, then you should also make thoughts, whether you already have the correct sim card. Because Apple's new smartphone requires a Nano Sim card. The Nano Sim card is currently the smallest available sim card size on the market and which is provided by a mobile network operator.
However, the nano-SIM card is still not very widespread, which means that if you have not owned an iPhone yet, you need to get a nano sim card for the iPhone 6. However, this is not a problem, because your mobile network operator should be able to help you very quickly in this issue.
Simply request a Nano Sim card at your mobile carrier and it will then be sent to you for the new iPhone 6.