Preparation is essential: As this is a device you will use every day, there is a lot involved. Even with a direct sync to the current phone/tablet, the device lock (PIN, password or pattern plus fingerprint) must be added, and apps on the new device will need to be signed into (with Keychain autofill makes this easier if set up). Any mobile banking app will have strong security so this has several steps to set up once the new phone is ready and the SIM is activated.