Question 1

What is the battery capacity of ZTE Grand S II S291?

Accepted Answer

The ZTE Grand S II S291 has a battery capacity of 2500 mAh

Question 2

How to reset or factory restore ZTE Grand S II S291 device?

Accepted Answer

The most common and recommended ways to reset or factory restore a ZTE Grand S II S291 device are:

Method 1: Hard Reset

1. Back up all important data and settings you don't want to lose.
2. Turn off the device and press and hold the power button down in combination with the volume down button. This will bring up the bootloader menu.
3. Select "English" and then "Recovery".
4. Wait for the device to boot into recovery mode.
5. Select "Yes - wipe data/factory reset".
6. Select "Yes" or "OK" to confirm the reset.
7. Wait for the device to reset completely, which can take several minutes.
8. Once the reset is complete, select "Reboot system" and then "English" before turning on the device.

Method 2: Required Downloadable Links

1. Download and install the latest version of ZTE MegaFlash Plus from the manufacturer's website.
2. Connect the device to your computer using a USB cable.
3. Launch ZTE MegaFlash Plus and select "Flash".
4. Choose "XML" from the drop-down menu and select "Yes" to confirm.
5. Select "Warning" and then "Yes" to confirm.
6. Select "Copy" and then "Yes" to confirm.
7. Wait for the device to reboot and select "English".
8. Turn on the device and it will boot up as if it's new.

Method 3: Using Settings

1. Open the Settings app and tap on "About phone".
2. Tap on "Build number" and then tap on it again until the "You are now a developer!" message appears.
3. Go back to Settings and tap on "Settings app version".
4. Tap on "Discover android settings" and then select "About phone".
5. Select "Software information" and then "Copy full system dump".
6. Turn off the device and press and hold the power button down.
7. Wait for the bootloader menu to appear and select "English".
8. Select "Recovery" and wait for the device to boot into recovery mode.
9. Connect the device to your computer using a USB cable.
10. Launch ZTE MegaFlash Plus and select "Flash".
11. Choose "XML" from the drop-down menu and select "Yes" to confirm.
12. Select "Warning" and then "Yes" to confirm.
13. Select "Copy" and then "Yes" to confirm.
14. Wait for the device to reboot and select "English".
15. Turn on the device and it will boot up as if it's new.

Method 4: Using the Internet

1. Download the latest version of ZTE MegaFlash Plus from the manufacturer's website.
2. Connect the device to your computer using a USB cable.
3. Launch ZTE MegaFlash Plus and select "Flash".
4. Choose "XML" from the drop-down menu and select "Yes" to confirm.
5. Select "Warning" and then "Yes" to confirm.
6. Select "Copy" and then "Yes" to confirm.
7. Wait for the device to reboot and select "English".
8. Turn on the device and it will boot up as if it's new.

Question 3

What type of SIM card does ZTE Grand S II S291 use?

Accepted Answer

The ZTE Grand S II S291 uses a micro-SIM card

Question 4

What is the display size of ZTE Grand S II S291?

Accepted Answer

The ZTE Grand S II S291 has a display size of 5.5 inches

Technology	GSM / HSPA / LTE
2G bands	GSM 850 / 900 / 1800 / 1900
3G bands	HSDPA 900 / 2100
4G bands	1, 3, 7
Speed	HSPA, LTE

Announced	2014, January. Released 2014, April
Status	Discontinued

Dimensions	157 x 77 x 9.1 mm (6.18 x 3.03 x 0.36 in)
Weight	150 g (5.29 oz)
SIM	Micro-SIM

Type	IPS LCD
Size	5.5 inches, 83.4 cm2 (~69.0% screen-to-body ratio)
Resolution	1080 x 1920 pixels, 16:9 ratio (~401 ppi density)

OS	Android 4.3 (Jelly Bean)
Chipset	Qualcomm MSM8974AB Snapdragon 801 (28 nm)
CPU	Quad-core 2.3 GHz Krait 400
GPU	Adreno 330

ZTE Grand S II S291