| Connectivity | 
                                                                                                  
                                                    | Bluetooth | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 3G | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 4G/LTE | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | Radio | FM radio | FM radio | FM radio | No | 
                                                                                                    
                                                    | WiFi | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | NFC |  |  | Yes | No | 
                                                                                                                                                                                                            
                                                  | Camera | 
                                                                                                  
                                                    | Front Camera | 25 MP | 8 MP | 8 MP | 16 MP | 
                                                                                                    
                                                    | Front Video Recording | 1080p@30fps | No | Yes | 8 MP | 
                                                                                                    
                                                    | Back Flash Light | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | Back Camera | 16 MP | 13 MP | 13 MP | 16 MP | 
                                                                                                    
                                                    | Back Video Recording | 1080p@30fps | 1080p@30fps | 1080p@30fps | 2 MP | 
                                                                                                    
                                                    | Front Flash Light |  |  | No |  | 
                                                                                                                                                                                                            
                                                  | Battery | 
                                                                                                  
                                                    | Type | Non-removable Li-Po 3500 mAh battery | Non-removable Li-Ion 4230 mAh battery | Non-removable Li-Ion 5000 mAh battery | Fast charging,Non-removable Li-Polymer 3700 mAh | 
                                                                                                                                                                                                            
                                                  | Performance | 
                                                                                                  
                                                    | Processor | Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) | Octa-core 1.8 GHz Cortex-A53 | Octa-core 2.0 GHz Cortex-A53 | 2x 2.2 GHz Kryo 360, 6x 1.7 GHz Kryo 360 | 
                                                                                                    
                                                    | GPU | Mali-G72 MP3 | Adreno 506 | Adreno 610 | Qualcomm Adreno 616 | 
                                                                                                                                                                                                            
                                                  | Memory | 
                                                                                                  
                                                    | Internal Memory | 64 GB | 16 GB | 128GB | 128 GB | 
                                                                                                    
                                                    | RAM | 6 GB or 4 GB RAM | 2 GB RAM | 4GB RAM | 6 GB RAM or 8 GB RAM | 
                                                                                                    
                                                    | Card Slot | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB | microSD, microSDHC, microSDXC | 
                                                                                                                                                                                                            
                                                  | Display | 
                                                                                                  
                                                    | Screen Size | 6.3 inches | 6.2 inches | 6.5 inches | 6.5 inches | 
                                                                                                    
                                                    | Screen Resolution | 1080 x 2340 pixels | 720 x 1520 pixels | 720 x 1600 Pixels | 1080 x 2340 pixels | 
                                                                                                    
                                                    | Screen Type | LTPS IPS LCD capacitive touchscreen, 16M colors | IPS LCD capacitive touchscreen, 16M colors | IPS LCD capacitive touchscreen, 16M colors | AMOLED Capacitive, Multi-touch | 
                                                                                                    
                                                    | Screen Protection | Corning Gorilla Glass 6 |  | Corning Gorilla Glass 3 | Capacitive, Multi-touch, Scratch resistant | 
                                                                                                                                                                                                            
                                                  | General Features | 
                                                                                                  
                                                    | Release Date | 2018, August | 2018, July | 2019, September |  | 
                                                                                                    
                                                    | SIM Support | Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | Nano-SIM , Dual Sim | 
                                                                                                    
                                                    | Phone Dimensions | 6.17 x 2.91 x 0.31 in | 6.15 x 2.98 x 0.32 in | 163.6 x 75.6 x 9.1 mm | 6.35 x 2.99 x 0.37 in | 
                                                                                                    
                                                    | Phone Weight | 169 g | 168 g | 195 g | 191 g | 
                                                                                                    
                                                    | Operating System | Android 8.1 (Oreo) | Android 8.1 (Oreo) | Android 9.0 Pie | ColorOS 6 (Android 9.0 Pie); |