Solution for Samsung Galaxy Tab unable to turn on problem

If you own a Samsung Galaxy Tab, have you ever encountered the problem of unable to turn it on after you off or reboot it?

The symptom could be:

• You press the Power button. No matter how long you pressed and how many times you pressed it, nothing happen. Your Samsung Galaxy Tab remains dead with a black screen.
• You press the Power button. It vibrates. But then it is dead again.
• You press the Power button while charging. It shows the battery charging icon for a while, then it is dead again. 
• You press the Power button. It freezes during boot up.

If you encounter this kind of problem, don't give up yet! Try this:

Touch any part of the screen with one finger, at the same time press the Power button. Wait for a while (and pray - might take up to 2 minutes). Your Samsung Galaxy Tab might come back to life again.

HTC Android 2.3.3 (Gingerbread) built-in battery reading graph

There are several 3rd party battery metering apps which can draw graph based on battery reading, but if you have recently updated your HTC smartphone to Android 2.3.3 (Gingerbread), your phone actually has a pretty nice built-in battery reading graph within the system. This feature is found in Gingerbread version of HTC Incredible S, HTC Desire HD, etc.

Go to Settings > About phone >Battery > Battery use and you'll see the screen similar to as below.

Note that on top of the screen is a slanting slope with information telling you how much time your phone is on battery since last charged. In fact, that slanting slope is your phone's battery reading graph. Right below the graph you will be able to see some blue marks. Don't worry, they are not screen display problem, but are actually indicators when battery is used by phone activities. If you charged your phone, you will also see green bar plotting the battery charging period.

Tap on it and you will get a clearer graph. The blue battery usage marks are further break down to the respective activity.

If you turn your phone to landscape orientation, this screen will also adjust itself to landscape view.

I think, with this nice battery plotting feature, you don't need to use any 3rd party battery metering apps anymore.

App: Keep an eye on apps that access your private data with Lookout Privacy Advisor

There are quite a number of private data stored in our smartphone, including our identity, contact details, location tracks, address book details, phone call logs, SMS messages, etc.

Do you want to keep an eye on the apps installed in your Android smartphone, to know what kind of private data they are able to access? In fact, these apps get access to our private data because we allowed them so during installation.

Anyhow, we don't want the apps to access our private data unless really needed. For example, SMS application such as Handcent need to access our mobile number, address book and SMS messages in order for it to function, but it should not access our location tracks unnecessarily.

Lookout Mobile Security (Premium Edition) for Android has a handy tools called Privacy Advisor that can scan through all the installed apps in our phone and provide us the insight of what kind of private data they are able to access.

After the scan, Privacy Advisor  will report how many apps has access to our Track Location, Identity Info, Messages and Contacts respectively.

It will list out all the apps with such private data access, and provide detail explanation of the findings.

If we click the "App Info & Options" button, it will go to the phone's application management function, which we have the option to uninstall the app if we want.

I find this feature pretty useful, but it is not available in the free version of Lookout Mobile Security.