1. Introdución
Benvidos ao Negroview A55 Pro user manual. This guide provides essential information on how to set up, operate, maintain, and troubleshoot your new Blackview A55 Pro smartphone. Please read this manual carefully to ensure optimal performance and longevity of your device.
O Negroview A55 Pro is a 4G Dual SIM unlocked cell phone featuring Android 11, a 6.528-inch HD+ display, an Octa-core MediaTek Helio P22 processor, 4GB RAM (expandable to 7GB), 64GB ROM (expandable to 1TB), a 4780mAh battery, 13MP rear camera, 5MP front camera, and Face ID/Fingerprint Unlock capabilities.
2. Que hai na caixa
Ao abrir o teu Blackview A55 Pro package, you should find the following items:
- Negroview A55 Pro Unlocked Android Phone
- Adaptador de cargador
- Cable USB
- Manual de usuario (este documento)
- Funda protectora

Imaxe: O Negroview A55 Pro smartphone, showcasino seu deseño.

Image: All items included in the Blackview A55 Pro retail package.
Video: An unboxing video demonstrating the contents of the Blackview A55 Pro package, including the phone, charger, USB cable, and protective case.
3. Configuración
3.1 Installing SIM and Micro-SD Cards
O Negroview A55 Pro supports two Nano SIM cards and one Micro-SD card for expandable storage up to 1TB. To install the cards:
- Retire con coidado a tapa traseira do teléfono.
- Locate the SIM card slots and Micro-SD card slot.
- Insira as tarxetas Nano SIM nas ranuras designadas.
- Insert your Micro-SD card into its slot (if applicable).
- Coloque a tapa posterior de forma segura.
- Importante: Restart the phone after inserting the SIM card(s) to ensure proper recognition by the network.

Imaxe: Interna view of the phone showing the placement of SIM card slots and the expandable storage slot.
3.2 Acendido/Apagado
- Para acender: Press and hold the Power button (located on the right side of the device) until the Blackview aparece o logotipo.
- Para apagar: Mantén premido o botón de acendido/apagado ata que aparezan as opcións de acendido/apagado na pantalla e, a seguir, selecciona "Apagar".
3.3 Configuración inicial do dispositivo
When you power on your Blackview A55 Pro for the first time, you will be guided through an initial setup process. This includes selecting your language, connecting to Wi-Fi, setting up your Google account, and configuring security features like fingerprint and face unlock.
4. Funcionamento do teu dispositivo
4.1 Visualización
O Negroview A55 Pro features a large 6.528-inch HD+ Waterdrop Screen with a resolution of 720*1600 pixels and a 20:9 aspect ratio. The display offers 400 nits brightness for clear visibility.

Image: The 6.528-inch HD+ display of the Blackview A55 Pro, showcasing a súa claridade visual.
4.2 Rendemento e almacenamento
Powered by an Octa-core MediaTek Helio P22 processor, the A55 Pro ensures smooth multitasking. It comes with 4GB of RAM, which can be expanded virtually to 7GB, and 64GB of internal storage. Storage can be further expanded up to 1TB using a Micro-SD card.

Image: Visual representation of the phone's powerful CPU, RAM, ROM, and expandable storage capabilities.
4.3 Cámara
Capture your moments with the 13MP rear camera and take selfies with the 5MP front camera. The dual-lens system is designed for clear image capture.

Imaxe: Detallada view of the phone's rear and front camera modules.
Batería 4.4
The device is equipped with a 4780mAh high-capacity battery, providing extended usage for entertainment and productivity throughout the day.

Image: Information on the 4780mAh battery and its long-lasting support.
4.5 Características de seguridade
O Negroview A55 Pro offers both Face Recognition Unlock and Fingerprint Unlock for secure and convenient access to your device. The fingerprint sensor is located on the rear of the phone.

Image: Demonstrating the Face Recognition and Fingerprint Unlock functionalities.
4.6 Operating System and Features
The phone runs on Android 11 with Blackview's Doke OS 2.1, which enhances user experience with various features:
- System Manager: Provides all-in-one controls for trash cleaning and battery management.
- Clone Phone: Safely transfers private data from an old device to the new one.
- Artistic Themes: Offers two sets of themes with enriching icons and invigorating wallpapers.
- Cámara fría: Freezes apps to prevent background running and save memory.
- Screenshot/Long Screenshot: Easily capture and edit screenshots.
- Dual-window Entertainment: View different content on the same screen simultaneously.

Imaxe: Examples of Doke OS 2.1 features in action.
4.7 Sistema de navegación
O Negroview A55 Pro integrates a 4-in-1 navigation system, supporting GPS, GLONASS, Beidou, and Galileo for faster and more accurate positioning.
5. Mantemento
To ensure your Blackview A55 Pro remains in optimal condition, follow these maintenance guidelines:
- Limpeza: Usa un pano suave e sen pelusa para limpar a pantalla e a carcasa do teléfono. Evita produtos químicos agresivos ou materiais abrasivos.
- Actualizacións de software: Regularly check for and install system updates to benefit from the latest features, security patches, and performance improvements. You can usually find this option in Configuración > Sistema > Actualización do sistema.
- Coidado da batería: Avoid extreme temperatures. Do not let the battery completely drain frequently. For long-term storage, charge the battery to around 50%.
- Xestión de almacenamento: Limpar periodicamente o innecesario files and uninstall unused apps to free up storage space and maintain device speed.
- Protección: Use the provided protective case to guard against drops and scratches.
6 Solución de problemas
Se tes problemas co teu Blackview A55 Pro, try the following solutions:
- O dispositivo non se acende: Asegúrate de que a batería estea cargada. Conecta o teléfono ao cargador e agarda uns minutos antes de tentar acendelo de novo.
- Aplicacións que se bloquean/conxelan: Close the problematic app and reopen it. If the issue persists, clear the app's cache and data (Configuración > Aplicacións > [Nome da aplicación] > Almacenamento > Borrar caché/Borrar datos). Como último recurso, desinstala e reinstala a aplicación.
- Conectividade de rede deficiente: Check if your SIM card is properly inserted. Ensure you are within network coverage. Try restarting your device. Verify your network settings (Configuración > Rede e Internet > Rede móbil).
- Esgotando a batería rapidamente: Reduce screen brightness, disable unused features like Wi-Fi, Bluetooth, and GPS when not needed. Close background apps. Check battery usage in Axustes> Batería para identificar aplicacións que consumen moita enerxía.
- Desbloqueo por impresión dixital/facial non funciona: Ensure your fingers are clean and dry for fingerprint unlock. For face unlock, ensure adequate lighting and that your face is clearly visible to the front camera. Re-register your fingerprint or face data if necessary.
- Device Slow Performance: Free up storage space, close unnecessary background apps, and restart your device. Consider using the 'Cold Room' feature in Doke OS 2.1 to manage apps.
If these steps do not resolve your issue, please contact Blackview atención ao cliente para obter máis asistencia.
7. Especificacións
| Característica | Especificación |
|---|---|
| Nome do modelo | Negroview A55 Pro |
| Sistema Operativo | Android 11.0 (Sistema operativo Doke 2.1) |
| Procesador | Octa-core MediaTek Helio P22 |
| RAM | 4 GB (Expandable to 7 GB) |
| Almacenamento interno | 64 GB |
| Almacenamento ampliable | Up to 1 TB with Micro-SD card |
| Tamaño da pantalla | 6.528 polgadas |
| Resolución | 720 x 1600 (HD+) |
| Cámara traseira | 13 MP |
| Cámara frontal | 5 MP |
| Capacidade da batería | 4780 mAh |
| Soporte de operadores inalámbricos | T-Mobile (Does NOT support AT&T, Cricket Wireless, Verizon, Sprint, Boost Mobile, Straight Talk, U.S.Cellular) |
| Tecnoloxía Celular | 4G (GSM: 850/900/1800/1900, WCDMA: B2/B4/B5/B8, FDD: B2/B3/B4/B5/B7/B12/B13/B17/B25/B26/B66, TDD: B41) |
| Tecnoloxías de Conectividade | Wi-Fi, Bluetooth |
| Sistema de navegación | GPS, GLONASS, Beidou, Galileo |
| Características de seguridade | Face ID, Fingerprint Unlock |
| Dimensións | 6.49 x 3.02 x 0.36 polgadas (164.75 x 76.7 x 9.2 mm) |
| Peso | 14 onzas (196 g) |
| Cor | Negro (poden estar dispoñibles outras cores) |
8. Garantía e soporte
O teu negroview A55 Pro comes with a standard manufacturer's warranty. For detailed warranty information, please refer to the warranty card included in your product packaging or visit the official Blackview website. For technical support, troubleshooting assistance, or service inquiries, please contact Blackview customer service through their official channels.
Nota importante sobre a compatibilidade da rede: O Negroview A55 Pro smartphone is NOT compatible with AT&T SIM cards or Cricket Wireless SIM cards. It DOES NOT work with CDMA Network Carriers such as Verizon, Sprint, Boost Mobile, Straight Talk, or U.S.Cellular. Please ensure your carrier is supported before use.





