The Vivo X7 is a good Android phone with 1.8Ghz Octa-Core processor that allows run games and heavy applications.
An advantage of the Vivo X7 is the possibility of using two mobile carriers, a Dual-SIM device with two SIM card slots.
Good connectivity of this device includes Bluetooth 4.0 version A2DP, WiFi 802.11 b/g/n (2.4Ghz), but it lacks NFC connection.
Including the battery, the Vivo X7 phone has 151 grams and it's a very thin device, only 7.2 mm.