We understand that you'd want to take full advantage of everything the Messages+ service has everything to offer. Especially, the syncing. It's such a valuable tool. We're very happy to help out! To use the cross device syncing, you'll need to turn on "Integrated Messaging". You can do this by following the information at #3 here under "Syncing Messages Across Devices": https://www.verizonwireless.com/support/verizon-messages-faqs/ Once Integrated Messaging is enabled, this will begin to work for you. Does this information help?