C4 - Smartphone BLU - Free user manual and instructions
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| Product Type | Smartphone |
| Brand | BLU |
| Model | C4 |
| Display Size | 4.0 inches |
| Display Resolution | 480 x 800 pixels |
| Processor | Quad-core 1.3 GHz |
| RAM | 512 MB |
| Internal Storage | 4 GB |
| Rear Camera | 5 MP |
| Front Camera | 2 MP |
| Battery Capacity | 1500 mAh |
| Operating System | Android 5.0 Lollipop |
| Dimensions (H x W x D) | 124.5 x 64 x 10.5 mm |
| Weight | 120 g |
| SIM Card Type | Micro-SIM |
| Connectivity | 3G, Wi-Fi 802.11 b/g/n, Bluetooth 4.0 |
| Navigation | GPS |
| Battery Type | Removable Li-Ion |
| Care and Cleaning | Wipe with a soft dry cloth; avoid liquids |
| Safety Information | Use only approved chargers and batteries; avoid exposure to extreme temperatures |
| Spare Parts & Repairability | Battery and back cover user-replaceable; other repairs by qualified technicians |
| General Information | Released in 2016; supports up to 32 GB microSD |
Frequently Asked Questions - C4 BLU
How do I insert the SIM card?
Remove the back cover and the battery. Insert the micro-SIM card into the slot with gold contacts facing down. Replace the battery and cover.
Can I expand the storage?
Yes, the BLU C4 supports microSD cards up to 32 GB. Insert it into the dedicated slot under the back cover.
How do I take a screenshot?
Press and hold the Power button and Volume Down button simultaneously for a few seconds until you hear a shutter sound or see a flash.
Why is my battery draining quickly?
Close unused apps, reduce screen brightness, and turn off Wi-Fi/Bluetooth when not in use. Check for apps running in the background via Settings > Battery.
How to reset the phone to factory settings?
Go to Settings > Backup & reset > Factory data reset. This will erase all data, so back up your important files first.
Can I use a 4G SIM?
No, the BLU C4 only supports 3G (HSPA+) networks. 4G LTE is not available.
How do I update the Android version?
Go to Settings > About phone > System updates. The device runs Android 5.0 and may not receive official updates beyond this version.
The touchscreen is unresponsive. What should I do?
Remove the screen protector if any. Restart the phone by holding the power button. If sticky, clean the screen with a soft dry cloth.
How do I transfer contacts from my old phone?
Use Bluetooth to send contacts, or save them to a VCF file on a SIM card. Alternatively, use Google Drive or a PC to sync via USB.
Can I use headphones with a microphone?
Yes, the phone has a 3.5 mm headphone jack. Standard headphones with or without a mic should work.
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USER MANUAL C4 BLU
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Product information
Brand : BLU
Model : C4
Category : Smartphone