| Connectivity | 
                                                                                                  
                                                    | Bluetooth | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 3G | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 4G/LTE | Yes | Yes | Yes | No | 
                                                                                                    
                                                    | Radio | FM radio | FM radio | FM radio; recording | FM radio | 
                                                                                                    
                                                    | WiFi | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | NFC |  |  | Yes | No | 
                                                                                                                                                                                                            
                                                  | Camera | 
                                                                                                  
                                                    | Front Video Recording | No | 1080p@30fps | 1080p@30fps | No | 
                                                                                                    
                                                    | Back Flash Light | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | Back Camera | 13 MP | 16 MP | 13 MP | 8 MP | 
                                                                                                    
                                                    | Back Video Recording | 1080p@30fps | 2160p@30fps, 1080p@30fps | 2160p@30fps, 1080p@30fps | Yes | 
                                                                                                    
                                                    | Front Flash Light |  | Yes |  | No | 
                                                                                                    
                                                    | Front Camera |  |  | 5 MP | VGA | 
                                                                                                                                                                                                            
                                                  | Battery | 
                                                                                                  
                                                    | Type | Non-removable Li-Po 2420 mAh battery | Non-removable Li-Ion 4050 mAh battery | Non-removable Li-Ion 5100 mAh battery | Removable Li-Po 2000 mAh battery | 
                                                                                                                                                                                                            
                                                  | Performance | 
                                                                                                  
                                                    | Processor | Octa-core 1.7 GHz Cortex-A53 | Octa-core 1.8 GHz Kryo 260 | Octa-core 2.0 GHz Cortex-A53 | Quad-core 1.3 GHz Cortex-A7 | 
                                                                                                    
                                                    | GPU | Mali-T760MP2 | Adreno 509 | Adreno 506 | Mali-400MP2 | 
                                                                                                                                                                                                            
                                                  | Memory | 
                                                                                                  
                                                    | Internal Memory | 32 GB | 64/128 GB | 64 GB | 8GB | 
                                                                                                    
                                                    | RAM | 3 GB RAM | 6 GB RAM or 64 GB 4 GB RAM | 4 GB RAM or 32 GB 3/4 GB RAM | 8GB 1GB RAM | 
                                                                                                    
                                                    | Card Slot | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 32 GB (dedicated slot) | 
                                                                                                                                                                                                            
                                                  | Display | 
                                                                                                  
                                                    | Screen Size | 5.0 inches | 5.99 inches | 5.5 inches | 4.7 inches | 
                                                                                                    
                                                    | Screen Resolution | 1080 x 1920 pixels | 1080 x 2160 pixels | 1080 x 1920 pixels | 540 x 960 pixels | 
                                                                                                    
                                                    | Screen Type | IPS LCD capacitive touchscreen, 16M colors | IPS LCD capacitive touchscreen, 16M colors | Super AMOLED capacitive touchscreen, 16M colors | Capacitive touchscreen, 16M colors | 
                                                                                                    
                                                    | Screen Protection | Corning Gorilla Glass 3 |  | Corning Gorilla Glass 3 | Corning Gorilla Glass | 
                                                                                                                                                                                                            
                                                  | General Features | 
                                                                                                  
                                                    | Release Date | 2015, September | 2018, October | 2016, September | 2013, December. Released 2013, December | 
                                                                                                    
                                                    | SIM Support | Hybrid Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Mini-SIM, dual stand-by) | 
                                                                                                    
                                                    | Phone Dimensions | 5.64 x 2.79 x 0.31 in | 6.14 x 2.95 x 0.31 in | 6.02 x 2.99 x 0.33 in | 5.43 x 2.75 x 0.35 in | 
                                                                                                    
                                                    | Phone Weight | 132 g | 165 g | 177 g | 126 g | 
                                                                                                    
                                                    | Operating System | Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow) | Android 8.1 (Oreo) | Android 6.0.1 (Marshmallow), upgradable to 7.0 (Nougat) | Android 4.2 (Jelly Bean) |