Android to Android
If you have an Android already, you probably also have a Google or a Gmail account, now the same thing—which will make this quite simple. If you don’t have a Gmail account, create one: you’ll need it to get the most out of your Android anyway.
1. Once that is set up, go to “Settings” on your old Android phone, then “Accounts,” and select “Google.” This will give you a list of items to sync, including your calendar and Drive documents.
2. Select “Contacts” and anything else you would like to transfer.
3. Check “Sync Now,” and your data will be saved in Google’s servers.
4. Start your new Android phone; it will ask you for your Google account information. When you sign in, your Android will sync contacts and other data automatically. If you started using your phone before you established a Google account, go to “Accounts & Sync” to add your account manually.
Android to iPhone
You can transfer your content through an app like the “Move iOS” app.
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.
1. Remove the SIM card from your Android device.
2. Insert the SIM card into your iPhone.
3. On the iPhone, tap the Settings app to open it.
4. Tap Contacts (on some older versions of the iOS, this is Mail, Contacts, Calendars).
5. Tap Import SIM Contacts.
When the transfer is done, your contacts are on your iPhone.
You can use the power of the cloud to keep all your data in sync. In this case, using Google is best since both Android and iPhone have good support for it.
1. On your Android device, back up your contacts to Google. The backup should happen automatically if you use your Google account on your device.
2. With that done, add your Google account to your iPhone.
3. When the account is set up, you may be able to enable contact syncing right away. If not, go to Settings -> Accounts & Passwords and tap your Gmail account.
4. Move the Contacts slider to the on (green) position, and the contacts you added to your Google account will sync to your iPhone.
5. From now on, any change you make to your iPhone address book syncs back to your Google account. You’ll have a complete copy of your address book in two places and ready to transfer to other devices as needed.
If you prefer, you can use Yahoo to sync your contacts to the iPhone rather than using Google. The process is similar.
The last method for transferring your contacts from one platform to another involves the classic way of syncing data to the iPhone: iTunes.
This method assumes that you have a computer you are syncing data to, rather than just syncing with the cloud.
1. Connect your Android device to your computer and sync it with your address book data. If you are running Windows 8, 8.1, or 10, you can download the Windows Phone Companion from the Microsoft Store for this purpose. Once your Android data has been synced, connect your iPhone to the computer to sync it.
2. In iTunes, click the iPhone icon in the top