This ultra mini phone comes with feature rich capabilities that can easily gives you the flexibility to do more. Apart from all the functions of a mobile phone this can also act as a Bluetooth speaker. Once you connect this phone, you can receive and make calls , check messages etc.This also has a built in FM Radio to give you flexibility to play your best station. All n all this is a multipurpose ultra compact smart device that can go with you anywhere you go. • Bluetooth Calling & Bluetooth Mobile Pairing: You need to pair your mobile with The Doel ET106 card feature mobile phone, then you can call to Anyone by Doel card feature phone through Bluetooth connectivity even there is no SIM card. • Smart phone Sync: YES, sync Phone Book, Call history: Once You pair your mobile with Doel card feature phone, all your contacts, SMS, Phone Book & Call History automatically sync in this phone. So you don't need to feed your contacts in this phone. • Working as separate Mobile phone: You can also insert micro SIM card and you can use it as separate mobile phone. • Light Weight, Slim mini Card Feature mobile Phone along with the FM: This mobile weight is very low its Only 50 gms. product, and it is also small size product, easy to carry and very handy. You can also play FM in this phone. • Amazing Battery Backup: This mobile has 500mAh Lithium-ion battery & you can use it 2-3 days.