I just got my Samsung Galaxy Tab 3 (SM-T110). I want to tether my tab to my PC, but I can't find the tether option under more settings. How to fix it?

I am using Samsung Galaxy Tab 3. I have important messages on my WhatsApp. Though my phone is backed up by Google Drive every night, I do not know how to use it for changing my number without losing my history chat. Is there any way that I can restore my chat history, especially chats with a personal contact, when I change my number?

I tried several versions of Odin and also several ROM's, yet successfully flashing still seem to fail.

Enter CS for MD5..
 Check MD5.. Do not unplug the cable..
 Please wait..
 Checking MD5 finished Sucessfully..
 Leave CS..
 Added!!
 Odin engine v(ID:3.1301)..
 File analysis..
 Total Binary size: 1397 M
 SetupConnection..
 Initialzation..
 Get PIT for mapping..
 Firmware update start..
 NAND Write Start!!
 SingleDownload.
 PBL.bin
 FAIL!

 Complete(Write) operation failed.
 All threads completed. (succeed 0 / failed 1

Please observe that with the newest version of Odin in the log above 'Get PIT for mapping' and 'PBL.bin' failed.

Added!!
 Removed!!
 Added!!
 Enter CS for MD5..
 Check MD5.. Do not unplug the cable..
 Please wait..
 T210XXBNI1_T210PHNBNI1_T210XXBNI1_HOME.tar.md5 is valid.
 Checking MD5 finished Sucessfully..
 Leave CS..
 Odin v.3 engine (ID:5)..
 File analysis..
 SetupConnection..
 Initialzation..
 Get PIT for mapping..
 Firmware update start..
 SingleDownload.
 PBL.bin
 NAND Write Start!!
 FAIL!

 Complete(Write) operation failed.
 All threads completed. (succeed 0 / failed 1)

` Please observe with an older version of Odin that in the log above 'Get PIT for mapping' and 'NAND write' failed. The stock ROM I seem to need for this device 'SM-T210, Tab3, 7.0, 8GB WiFi, has these specs: KOT49H, T210XXBOB1, PHN, build date Feb 3 2015, Android version 4.4.2 Kernel version: 3.4.5-4081557 I'm not sure if it's KitKat or Jelly Bean as both seem to have similar versions of Android. So what's going wrong here?

So on my samsung galaxy tab 3 running android kitkat, I noticed something in the notification bar. An app named samsung apps was downloading new apps, as if it was like the normal app store. One was Samsung billing. After each download I was prompted, "Google may regularly check installed apps for potentially harmfull behaviour. Learn more in Google Settings > Verify apps." It was followed by an accept and decline. I just pressed the back button and it went away. Then I noticee samsung apps was renamed Galaxy Apps. Is this a legitimate new update? Did anyone else get this? (If you use a samsung device).

I have a samsung galaxy tab 3 8.0 running android 4.4.2 unrooted. My tablet is not automatically connecting to wifi networks. It was previously automatically connecting to two wifi networks (both are home networks secured with a password) but now I have to re-enter the password every time I try to connect to either of these networks. How can I get my tablet to remember the wifi networks?

I allowed my nephew to play with my Samsung tab 3 and it is now saying that I have accessed an account without being authorized and is asking for a password that I have never set, what can I do, without doing a factory reset?

As I lost the access code that Viber sent to me, I cannot sign in my Viber account. I signed in on another device. Now, I want to deactivate the account, so that the device holder cannot get my messages and conversations.

I have Samsung GALAXY Tab 3 (SM-T210) and recently upgraded it to KitKat. I just noticed now that I lost my Samsung account. It's not on my application list either. Is there anyway to reinstall it? I've done factory reset and it's still missing.