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There are two kinds of Speed Class, "Speed Class" and "UHS Speed Class." As a characteristic of flash memory, actual transfer speed varies. Variable speeds are difficult to reliably record streaming content such as video because it requires a constant writing speed. Speed Class and UHS Speed Class provide the constant speed necessary for video recording by designating a minimum writing performance so that minimum and constant speed　could be achieved for camcorders, video recorders and other devices with video recording capabilities under the conditional write operation specified in the standard. Speed Class, designated as Class 2, 4, 6 and 10, is designed for normal and high speed bus interface (mode) and UHS Speed Classes 1 and 3 are designed for UHS bus interface*. (Speed Class and the UHS Speed Class are not compatible.) *UHS (Ultra High Speed), the fastest p erfo rmance category available today, defines bus-interface speeds up to 312 Megabytes.   Mark

After a lot of research on Google and hours of R&D finally found the cause and solution of this problem. As this problem was first time in my 6 years of android experience, I want to find out the main reason behind this problem to occur. The main cause of this problem is host file IP address, which got changed due to some app (it was Freedom app). So, the easiest solution is just delete host file! simple! Here is complete solution with explanations... Issues: - Account sync OFF permanently with the message: "Sync is currently experiencing problems". - Signing in Google Apps fails showing message: "Can't establish a reliable connection to the server" Cause: - system file named 'hosts' (/etc/hosts) points to a Google server that changed IP, thus blocking access to Apps. Possible Solution: edit 'hosts' file (/etc/hosts) deleting or commenting (adding a # at the beginning) the old line Please do it at your own risk. If abov

Have you facing errors like, Could't sign in Can't establish a reliable connection to the server. This could be a temporary problem or your android device may not be provisioned for data services. if it continues, call customer care. I have tried  hard reset rebooting connecting via wifi reflashed rom youtube trick gmail trick VPN changing Trying 3G taking out SIM, etc. none of these worked. But here is only simple solution ... ###Please do it at your own risk.### 1.- Root your device (of course) 2.- Editing the host file You will need a proper editor, use ES file manager   3.- Browse with ES file manager to root/etc OR etc folder Open etc/hosts and edit as a text file. Just put # before  74.155.43.123  android.clients.google.com. (numbers can be different) 4.- Save Edited file should look like this: 127.0.0.1 localhost #74.155.43.123 android.clients.google.com  Remember: it should be look like this: 127.0.0.