The Samsung Galaxy E7 smartphone users can look for an upgrade with the Oppo F1s or the Vivo V3 Max. Let's compare the core specifications to help you decide.

Starting with the design and display, the trio features a huge 5.5" display varying in resolution. The Oppo F1s and the Galaxy E7 come with lower resolution of 720 x 1280, while Vivo V3 Max has better (1080 X 1920) screen resolution.

In terms of performance, the Vivo V3 Max do well with an octa core 1.8 GHz Snapdragon 652 processor. While the Galaxy E7 features a quad core Snapdragon 410 processor clocking at 1.2GHz, Oppo F1s comes with octa core MediaTek processor clocking at 1.5 gHz.

The Oppo F1s and the Vivo V3 Max have a 32GB variant with 3GB & 4GB RAM respectively. However, the E7 lags behind with only 16GB internal space and 2BG RAM. The Galaxy E7 has microSD support up-to 64GB while the other two have 256GB capacity.

In terms of battery, the Vivo V3 Max comes with 3000 mAH, while the Galaxy E7 has a smaller 2950 mAH battery as compared to Oppo F1s's 3075 mAH battery.

The rear camera in the trio feature a similar 13 MP lens with phase detection autofocus feature except in E7. The low-light imaging is illuminated by a LED flash. The Oppo F1s takes away the selfie round with a stunning 16 MP front snapper. On the other hand, Vivo V3 Max has 8MP lens in front camera while E7 has only 5MP selfie camera.

Currently, the trip runs on Android 5.1 Lollipop operating system. However, the Galaxy E7 was launched with Android 4.4.4 Kitkat. Also, we get fingerprint sensors only on Vivo and Oppo.

The Vivo V3 Max and the Oppo F1s can be a good upgrade from the Galaxy E7. The V3 Max comes with higher price tag, but with a better processor and screen resolution and more RAM than the Oppo F1s. On the other hand, the best thing about Oppo F1s is the amazing built and the selfie camera.