Operating system and Hardware
The LG G Flex2 is packed with Android v5.0.1 (Lollipop) OS while LG G3 is coming with Android v4.4.2 (KitKat)OS, but it is upgradable to Android v5.0.1 (Lollipop) OS via OTA. LG used MSM8994 Qualcomm Snapdragon 810 chipset in their latest flagship, which has integrated Octa-core processor (1.5 GHz Quad-core Cortex-A53 & 2 GHz Quad-core Cortex-A57) and Adreno 430 GPU. The LG G3 has MSM8975AC Qualcomm Snapdragon 801 chipset. It has 2.5 GHz Quad-core Krait 400 Processor and Adreno 330 GPU.
Both phones have accelerometer, gyro, proximity and compass sensors. LG offering 2GB and 3GB RAM variants in these phones with different storage variants.
LG G Flex2 has 5.5 Inches Full HD Curved P-OLED capacitive touchscreen with 1080 x 1920 pixels resolutions and 403 ppi pixel density. The LG G3 has 5.5 Inches True HD-IPS + LCD capacitive touchscreen with 1440 x 2560 pixels resolutions and 538 ppi pixels density. both phones are coming with Corning Gorilla Glass 3 protection. The LG G3 has higher resolutions and pixels density. If you are considering to buy curved display phone, go for LG G Flex2.
LG offering 13MP rear and 2.1MP front cameras in both phones. Camera features are same in these phones except 1/3” sensor size in LG G3. The sensor size has impotent role in camera features. LG G3 can perform better in this section.
There is no difference in storage capacity, Both phones are coming with 16GB/32GB storage variants and microSD card support. These phones can handle up to 128GB microSD card.
LG G Flex2 has 3000 mAh non-removable Li-Po battery while LG G3 has 3000 mAh replaceable Li-Po battery. No other difference in this section.
Both phones will support 2G 3G and 4G networks. LG used CAT6 LTE technology in LG G Flex2. The LG G3 is coming with CAT4 technology. The new hero can provide up to 300Mbps download speed in 4G data network. The LG G3 will support up to 150Mbps download speed.
For data transferring and sharing, these tow phones have Wi-Fi, Bluetooth, A-GPS, NFC, Infrared and microUSB port.
LG G Flex2 is coming with Self-healing back panel coating. It has 149.1 x 75.3 x 7.1-9.4 mm dimensions and 152 grams weight. LG used Curved body and display design in G Flex2. The LG G3 has 146.3 x 74.6 x 8.9 mm dimensions and 149 grams weight.