| Connectivity | 
                                                                                                  
                                                    | Bluetooth | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 3G | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 4G/LTE | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | Radio | No | FM radio | FM radio | To be confirmed | 
                                                                                                    
                                                    | WiFi | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | NFC | Yes |  |  |  | 
                                                                                                                                                                                                            
                                                  | Camera | 
                                                                                                  
                                                    | Front Camera | 5 MP | 4 MP | 8 MP | 8 MP | 
                                                                                                    
                                                    | Front Flash Light | No | No |  |  | 
                                                                                                    
                                                    | Front Video Recording | 1080p@30fps | 1080p@30fps | 1080p@30fps | 1080p@30fps | 
                                                                                                    
                                                    | Back Flash Light | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | Back Camera | 12 MP | 13 MP | 16 MP | 13 MP | 
                                                                                                    
                                                    | Back Video Recording | 2160p@30fps, 720p@120fps, HDR, stereo sound rec. | 1080p@30fps | 1080p@30fps | 1080p@30fps | 
                                                                                                                                                                                                            
                                                  | Battery | 
                                                                                                  
                                                    | Type | Non-removable Li-Ion 3000 mAh battery | Removable Li-Ion 2600 mAh battery | Non-removable 4000 mAh battery | Non-removable Li-Ion 2965 mAh battery | 
                                                                                                                                                                                                            
                                                  | Performance | 
                                                                                                  
                                                    | Processor | Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo) | Octa-core 1.5 GHz Cortex-A53 | Octa-core (4x1.8 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53) | Octa-core 1.8 GHz Cortex-A53 | 
                                                                                                    
                                                    | GPU | Adreno 530 | Mali-T760MP2 | Mali-T860MP2 | Adreno 506 | 
                                                                                                                                                                                                            
                                                  | Memory | 
                                                                                                  
                                                    | Internal Memory | 32/64 GB | 16 GB | 32 GB | 32 GB | 
                                                                                                    
                                                    | RAM | 4 GB RAM | 2 GB RAM | 3 GB RAM | 3 GB RAM | 
                                                                                                    
                                                    | Card Slot | microSD, up to 512 GB (dedicated slot) | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB | microSD, up to 512 GB (uses SIM 2 slot) | 
                                                                                                                                                                                                            
                                                  | Display | 
                                                                                                  
                                                    | Screen Size | 5.2 inches | 5.5 inches | 5.5 inches | 6.0 inches | 
                                                                                                    
                                                    | Screen Resolution | 1440 x 2560 pixels | 720 x 1280 pixels | 1080 x 1920 pixels | 720 x 1440 pixels | 
                                                                                                    
                                                    | Screen Type | Super LCD5 capacitive touchscreen, 16M colors | Capacitive touchscreen, 16M colors | Super LCD capacitive touchscreen, 16M colors | IPS LCD capacitive touchscreen, 16M colors | 
                                                                                                    
                                                    | Screen Protection | Corning Gorilla Glass 3 |  | Corning Gorilla Glass (unspecified version) |  | 
                                                                                                                                                                                                            
                                                  | General Features | 
                                                                                                  
                                                    | Release Date | 2016, April | 2015, October | 2017, April | 2018, March | 
                                                                                                    
                                                    | SIM Support | Nano-SIM | Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | 
                                                                                                    
                                                    | Phone Dimensions | 5.74 x 2.83 x 0.35 in | 6.21 x 3.14 x 0.30 in | 6.02 x 2.98 x 0.32 in | 6.23 x 3.02 x 0.33 in | 
                                                                                                    
                                                    | Phone Weight | 161 g | 165 g | 175 g | 157.5 g | 
                                                                                                    
                                                    | Operating System | Android 6.0.1 (Marshmallow), upgradable to Android 8.0 (Oreo) | Android 5.0 (Lollipop) | Android OS | Android 8.0 (Oreo) |