Showing posts with label Android. Show all posts
Showing posts with label Android. Show all posts

Tuesday, May 24, 2016

How to switch or select OS(operating system) in Teclast X98 dual boot tablet.

I bought secondhand Teclast X98 Air ii and I couldn't find any way to enter Windows OS(operating system).

So I googled it and I found that

to enter OS selection screen in Teclast dual boot tablet.
'Volume Up' button + 'Power' button will enter the OS selection screen.

How to switch or select OS(Operating System) in Teclast dual boot tablet.

Easy way to do this is first press 'volume up' button and then press 'Power' button.

How about other dual boot tablet?

Many other tablets like Chuwi, Cube has dedicated Windows application and Android system app so you can use this application or app to change to desired OS.

And Teclast X98 Air 3G also had this app. But Teclast X98 Air ii doesn't have this app--maybe there has but my tablet doesn't have.

If you have Teclast X98 Air 3G and would like to install os-switch app, you can check this link:

Details about OS selection process in Teclast dual boot tablet.

When you enter the OS selection screen,
Teclast X98 Air ii - OS selection (Android, Windows) screen

you can either choose from top left corner check-box:
  • boot up OS without OS selection screen
  • or boot up OS with OS selection screen in 10 seconds.

Teclast X98 Air ii dualboot tablet- OS selection (Android, Windows) screen explained

So if you remove that tick in check-box, you won't see this OS selection screen. So if you need to change OS, you have to Volume Up and Power button together to see this screen.

And choose whatever OS (Android or Windows) you desire, and touch 'choose OS' button.

When you changed OS, you will see message like this:
Teclast X98 Air ii - when the os selection was changed.

Thursday, May 19, 2016

Teclast X98 Air ii, dual boot tablet - how to change memory size for android.

Is it possible without reinstalling the system?

Answer looks like 'no' at the moment.

I am trying to reduce the Android memory size and increase the Windows hard disk size.
What I have found so far, I can delete whole Android system or delete whole Windows system.
It looks like quite hard(or impossible) to reduce the Android size because Android uses 7+ partition which you can see the below photo.

So it should better to install one by one--Windows 8.1 and then Android. Or vice versa. During installation, I think it can allocate partition size--I haven't found out yet so it was just my guessing.

First, how much space on the 64GB hard drive is assigned to Android and Windows?

I bought secondhand x98 air ii 64gb so I'm not sure about whether it is factory setup or not.
But mine was 39gb(include 5gb for windows recovery) for Windows and other remains--22gb(it seems) for Android.

Here is partition allocation table from Windows' disk management.
Teclast X98 Air ii 64gb - default partition allocation - Windows 8.1's disk management

Here is Android's memory size from storage menu in settings.
Teclast X98 Air ii 64gb - default Android memory size - Storage menu in Settings.

Second, what is the optimal partition size for Android and Windows?

I think there hasn't any optimal partition size because it's all depend on usage.
I don't like installing so many apps on Android and Windows. So in my case, 8gb is surely enough for my Android--I have a 16gb android tablet and half was empty so I can manage with that size. And I can put data(ebooks, songs, videos, etc) on micro-sd memory.
And I don't need big memory on Windows but sometimes, some software need big size--mostly games, so I'd like to have more space on Windows.

I'm thinking about upgrade to Android 5.0 from 4.4.4. So during that process, I hope to reduce the partition size.

This is one guide that delete Android and then those Android's memory allocate to Windows so without reinstalling the os--operating system.

* Koko Pudja's guide: How to delete Android and merge partitions in Windows for more space
Same tutorial but with photos to help much easy to follow.

I think this guide is apply to all the dual boot tablet such as Chuwi, Teclast, (Onda, Cube?) which had two operating system, Windows and Android.

Friday, September 27, 2013

I don't want to lose all my data when Android phone's pattern was locked with no internet connection.

I didn't use this phone for a while so I have forgotten the pattern. So I was trying to remember it but failed several times.
And I've got this message.
'Too many pattern attempts' in Android phone. Because I totally forgot the pattern.
'Too many pattern attempts' in Android phone. Because I totally forgot the pattern.

And I googled it and I found the way but I turned off the internet so I can't unlock it with my google account.

So I googled it again and I found the way which requires factory reset. But problem is factory reset means erase all my data which I don't like to do.

No internet connection. I can't turn wifi on when Android gadget's pattern was locked.

And finally I found the way that doesn't need to factory reset.

Here is the article:

Unlock an Android Device without Internet Access – Using ADB commands @ February 28, 2013 by chethakau

Here is what I tweeted about it:

#Unlock an #Android Device without Internet Access – Using #ADB commands by chethakau
5:58 PM – 23 Sep 13
I can do factory reset but don't want to lose all my data. Problem is phone's wifi was off and without sim card so no internet connection.
6:18 PM – 23 Sep 13

There has some requirements for to do these steps so you should read that article before do it.

Anyway, now I can use my phone again so thank you, chethakau.

P.S. My previous blog is in wordpress but I have to move to here. So I'm sorry about the confusion.