For a dumb phone, my Gravity t379 has served me well. The keyboard is great.
But when I upgraded, it took me a while to figure out how to transfer my contacts to my new phone.

Yes you can transfer your Samsung Gravity t379 dumb phone contacts to a new smart phone! Easy! You use Bluetooth. You do not need to have phone service on either phone for this to work.

1)Turn on the Bluetooth feature on your smart phone and if necessary, click scan for devices.
2) on the t379, go to Menu, Settings, Bluetooth (I don't know if you need to do all of these steps but this is what worked for me) click to turn Bluetooth on, click my Visibility to On, click Remote SIM mode On, then go to My devices and search. When you see your smart phone choose it and click options, then click Authorize device. Click yes if needed,.
3) you probably will have to approve this on your smart phone, and then approve it or ok it on the T379
4) go back to menu, click on People, then Contacts, then this is weird, on some models you must pull open the keyboard to see all the options, so do that. Click Options, scroll down and Select: Send namecard via, and Choose Bluetooth, Select Multiple, then Mark All (or just the names you want)
5) Choose Select, Then Select your device
6) Click Ok or Yes  or Accept on your Smartphone and after a couple of minutes, Voila! It's done.
For a dumb phone, my Gravity t379 has served me well. The keyboard is great. But when I upgraded, it took me a while to figure out how to transfer my contacts to my new phone. Yes you can transfer your Samsung Gravity t379 dumb phone contacts to a new smart phone! Easy! You use Bluetooth. You do not need to have phone service on either phone for this to work. 1)Turn on the Bluetooth feature on your smart phone and if necessary, click scan for devices. 2) on the t379, go to Menu, Settings, Bluetooth (I don't know if you need to do all of these steps but this is what worked for me) click to turn Bluetooth on, click my Visibility to On, click Remote SIM mode On, then go to My devices and search. When you see your smart phone choose it and click options, then click Authorize device. Click yes if needed,. 3) you probably will have to approve this on your smart phone, and then approve it or ok it on the T379
4) go back to menu, click on People, then Contacts, then this is weird, on some models you must pull open the keyboard to see all the options, so do that. Click Options, scroll down and Select: Send namecard via, and Choose Bluetooth, Select Multiple, then Mark All (or just the names you want)
5) Choose Select, Then Select your device
6) Click Ok or Yes  or Accept on your Smartphone and after a couple of minutes, Voila! It's done.