SIM Card transfer
If you are only interested in moving your contacts, you can do so by using your SIM card. Since you can store address book data on an Android SIM card, you can back up your contacts there and move them to your iPhone. The Sim cards must be the same size in both devices. All iPhones beginning with iPhone 5 use Nano SIMs.
On your Android device, backup your address book contacts to your device's SIM card.
Remove the SIM card from your Android device.
Insert the SIM card into your iPhone.
On the iPhone, tap the Settings app to open it.
Tap Contacts (on some older versions of the iOS, this is Mail, Contacts, Calendars).
Tap Import SIM Contacts.
When the transfer is done, your contacts are on your iPhone.