| Connectivity | 
                                                                                                  
                                                    | Bluetooth | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 3G | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | 4G/LTE | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | Radio | FM radio | FM radio | FM radio | Yes | 
                                                                                                    
                                                    | WiFi | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | NFC |  |  | Yes | No | 
                                                                                                                                                                                                            
                                                  | Camera | 
                                                                                                  
                                                    | Front Camera | 25 MP | 8 MP | 8 MP | 5 MP, f/2.4, 1/5 | 
                                                                                                    
                                                    | Front Video Recording | 1080p@30fps | No | Yes | 1080p@30fps | 
                                                                                                    
                                                    | Back Flash Light | Yes | Yes | Yes | Yes | 
                                                                                                    
                                                    | Back Camera | 16 MP | 13 MP | 13 MP | Dual 13 MP, f/2.2, 1/3.1 | 
                                                                                                    
                                                    | Back Video Recording | 1080p@30fps | 1080p@30fps | 1080p@30fps | 2160p@30fps | 
                                                                                                    
                                                    | Front Flash Light |  |  | No | Yes | 
                                                                                                                                                                                                            
                                                  | Battery | 
                                                                                                  
                                                    | Type | Non-removable Li-Po 3500 mAh battery | Non-removable Li-Ion 4230 mAh battery | Non-removable Li-Ion 5000 mAh battery | Non-removable Li-Po 4230 mAh battery | 
                                                                                                                                                                                                            
                                                  | 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 | Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) | 
                                                                                                    
                                                    | GPU | Mali-G72 MP3 | Adreno 506 | Adreno 610 | PowerVR GE8320 | 
                                                                                                                                                                                                            
                                                  | Memory | 
                                                                                                  
                                                    | Internal Memory | 64 GB | 16 GB | 128GB | 32GB | 
                                                                                                    
                                                    | RAM | 6 GB or 4 GB RAM | 2 GB RAM | 4GB RAM | 2GB | 
                                                                                                    
                                                    | Card Slot | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB | Yes | 
                                                                                                                                                                                                            
                                                  | Display | 
                                                                                                  
                                                    | Screen Size | 6.3 inches | 6.2 inches | 6.5 inches | 6.22 inches | 
                                                                                                    
                                                    | Screen Resolution | 1080 x 2340 pixels | 720 x 1520 pixels | 720 x 1600 Pixels | 720 x 1520 pixels | 
                                                                                                    
                                                    | Screen Type | LTPS IPS LCD capacitive touchscreen, 16M colors | IPS LCD capacitive touchscreen, 16M colors | IPS LCD capacitive touchscreen, 16M colors | IPS LCD capacitive touchscreen, 16M colors | 
                                                                                                    
                                                    | Screen Protection | Corning Gorilla Glass 6 |  | Corning Gorilla Glass 3 | Corning Gorilla Glass 3 | 
                                                                                                                                                                                                            
                                                  | General Features | 
                                                                                                  
                                                    | Release Date | 2018, August | 2018, July | 2019, September | 2020-06-01 | 
                                                                                                    
                                                    | SIM Support | Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) | 
                                                                                                    
                                                    | 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 | 155.9 x 75.5 x 8.3 mm | 
                                                                                                    
                                                    | Phone Weight | 169 g | 168 g | 195 g | 165 g | 
                                                                                                    
                                                    | Operating System | Android 8.1 (Oreo) | Android 8.1 (Oreo) | Android 9.0 Pie | Android 9.0 (Pie), ColorOS 6.1 |