Turn on the Automatic Phonebook Download feature, and every time you connect your Bluetooth®-enabled phone, it will update any additions or changes you've made to your contacts.48 With ATT NumberSync for Connected Car, your smartphone number syncs with your car to make and receive calls on the go, even if your phone isnrsquo;t with you. Along with the NumberSync feature, this plan also includes 5G access and unlimited ATT In-car Wi-Fi for $20/mo.\n\nYoursquo;ll be able to use unlimited hands-free calling in your car with your smartphone number. Your passengers can stream, browse, and share from their favorite device with the carrsquo;s powerful Wi-Fi hotspot. Plus, yoursquo;ll have a strong, reliable connection from your car antenna. Sorry there was a problem sending your feedback. Please try again