D405n L90 - Smartphone LG - Free user manual and instructions
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| Product Type | Smartphone |
| Brand | LG |
| Model | D405n L90 |
| Dimensions | 131.6 x 66 x 9.9 mm |
| Weight | 129 g |
| Battery Capacity | 2540 mAh (removable Li-Ion) |
| Operating System | Android 4.4.2 KitKat |
| Processor | Qualcomm Snapdragon 400, quad-core 1.2 GHz |
| RAM | 1 GB |
| Internal Storage | 8 GB (expandable via microSD up to 32 GB) |
| Display | 4.7 inch IPS LCD, 540x960 pixels |
| Rear Camera | 8 MP with LED flash |
| Front Camera | 1.3 MP |
| Connectivity | Wi-Fi 802.11 b/g/n, Bluetooth 4.0, GPS, microUSB 2.0 |
| Sensors | Accelerometer, proximity, compass |
| Main Functions | Calls, messaging, internet browsing, camera, GPS navigation, multimedia playback, app support |
| Maintenance | Wipe with a dry cloth; avoid liquids and harsh chemicals |
| Safety | Do not disassemble; use only LG-approved chargers; avoid extreme temperatures |
| Spare Parts & Repairability | Battery and back cover user-replaceable; screen and internal repairs by LG service centers |
Frequently Asked Questions - D405n L90 LG
How do I insert a SIM card and microSD card?
Remove the back cover and battery. Insert the micro-SIM card into the SIM slot and the microSD card into the expansion slot. Replace the battery and cover.
How can I extend battery life?
Reduce screen brightness, disable unused connectivity (Wi-Fi, Bluetooth, GPS), close background apps, and use power saving mode.
How do I perform a factory reset?
Go to Settings > Backup & reset > Factory data reset. Alternatively, press and hold Power + Volume Down when the device is off until recovery mode appears, then select wipe data/factory reset.
What should I do if the screen is unresponsive?
Try a force restart by pressing and holding the Power button for 10 seconds. If the issue persists, remove the battery for a few seconds and reinsert.
How do I update the software?
Go to Settings > About phone > Software update and check for updates. Ensure a stable Wi-Fi connection and sufficient battery.
Can I replace the battery myself?
Yes, the battery is user-replaceable. Remove the back cover and lift the battery out. Use only LG-approved batteries.
How do I take a screenshot?
Press and hold the Power and Volume Down buttons simultaneously for about 2 seconds. The screenshot will be saved in the Gallery.
Why is my device overheating?
Avoid using the phone while charging, close heavy apps, and remove the case while charging. If overheating persists, contact LG support.
What storage options are available?
The device has 8 GB internal storage, expandable via microSD card up to 32 GB.
Does the phone support 4G LTE?
No, the LG D405n L90 supports 3G HSPA+ only. It is not 4G capable.
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