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Resetting HTC Desire U by Hardware Buttons:

These steps is also helpful when your HTC Desire U is unresponsive or frozen and theres no way to access the settings.

• First, press and hold the Volume Down button, and then do the same way on the Power button.

• Hold the two buttons until the three Android images appear on the Lcd. 

• Release the button when the three Android images appear and press Volume Down.

• Tap on Factory Reset, and then press the Power Button to confirm.

Compare Sony Xperia U vs ZTE Grand X V970M - ZTE Grand X and Sony Xperia U both powered with a dual core processor. ZTE Grand X using the MT6577 chip with support for dual-core 1GHz processor, PowerVR SGX531 GPU, and 512MB RAM. While Sony Xperia U using NovaThor chip with a 1GHz processor support, Mail-400 GPU and 512MB RAM. For performance both offer about the same performance.

ZTE Grand X present uses the Android operating system that is more nautical version 4.1 Jelly Bean. While Sony Xperia U is present using the operating system Android 2.3 Gingerbread, and Sony has provided Android 4.0 ICS update for this smartphone.

ZTE Grand X has a size larger touch screen, where ZTE Grand X uses a touch screen measuring 4.3 inches with a resolution of 540 x 960 pixels (256ppi). While Sony Xperia U uses a 3.5-inch touch screen with a resolution of 480 x 854 pixels (280ppi) and comes with Sony Mobile BRAVIA Engine technology.

Sony Xperia U has an internal memory capacity of 8GB, which can be used by the user is 4GB. And the smartphones main shortcoming is the absence of an external memory slot. While ZTE Grand X has an internal memory capacity of 4GB plus microSD slot support up to 32GB.

ZTE Grand X and Sony Xperia U are both equipped with a 5 megapixel camera with LED flash. ZTE Camera Grand X has the ability to record full HD 1080p video, while the camera Sony Xperia U has the ability to record 720p HD video. Both are also equipped with a VGA front camera.

ZTE Grand X is an Android smartphone dual SIM GSM + GSM, while the Sony Xperia U only supports single SIM GSM. Both are equipped with connectivity features like 3G network support HSDPA / HSUPA, WiFi hotspot, Bluetooth, micro USB port, and GPS.

And for power, ZTE Grand X is equipped with a battery capacity of 1600mAh, while the Sony Xperia U is equipped with a battery capacity of 1320mAh.

Although both have almost the same price tag, but ZTE Grand X offers some better features such as a bigger screen, support external memory slot, dual GSM SIM, camera with 1080p HD video recording capabilities, a larger battery capacity.