The headphone jack is 2.5mm. You can buy them from online. They are usually not sold in stores. Most preferred websites is Amazon.com or ebay..
go to settings the go to format
The thinnest Android phone right now is the Huawei Ascend P1 S at 6.68 mm.
Yes it does! You can simply download the facebook app from the Android Market.
Huawei Ascend was created on 2010-10-27.
NO
You can order your Huawei Ascend P7 from oppomart.com.
Yess.
There are sites out there (XDA-Developers as an example) that has how-to's on flashing a customized ROM for the Huawei Ascend (see related links). Proceed with caution...modifying your phone's OS will void your warranty, and if not done properly, you could run the risk of bricking the device. Incidentally, because Android is "open-sourced", it's easily modifiable compared to say, an iOS (Apple) device. So in essence, you are not really jailbraking an Android device, but instead unlocking it.
20 dollars
Yup it sure does
Yes, of course
I am using huawei ascend p7. in my opinion xiaomi is better than huawei..