Enabling OTG support in Micromax Canvas Nitro A310

Device info :

• Model Number : Micromax A310


• Android Version : 4.4.2


• Kernel Version : 3.4.67

The question here doesn't clear out whether all Android devices has OTG support or not. I need OTG support for my device and used USB OTG Checker to check OTG support. The app says -

Your Device OS NOT Support USB OTG!

There is another general note mentioned there that interested me a lot which says -

Important Note: USB OTG function only able fully work if your device OS has USB OTG API and load with USB OTG Kernel.

But on the other hand, looking on Google for enabling OTG support in my device ended me with this XDA link which says that Stock Rom doesn't provide OTG support and solely rooting your device can sort this out.

So the questions are-

1. 
   

   Does rooting a device really enables OTG support?

   
   


2. 
   

   If not, can external API and a USB OTG Kernel be loaded in a Stock ROM to get the desired functionality? Can loading external API has ever been done before somewhere? I know doing such about kernel.

   
   


3. 
   

   If (2) is true, then does the fact that compatible HW is also required becomes irrelevant?

   
   


4. 
   

   Not to mention, I do need to know can I get OTG support if its possible?

   
   

Nexus 6 OTA from 5.0.1 to 5.1 fails - Error in block.map

I am trying to upgrade my Nexus 6 with version 5.0.1 (Build number LRX22C) via OTA to Android 5.1.

The OTA update is downloaded successfully and after pressing "Restart & Install" I see a dead droid with the message "Error!".

The phone was rooted and I unrooted it via SuperSU. Did not help. Wiping cache partition also did not change anything.

These are the logs:

Finding update package..
Opening update package..
Verifying update package..
Installing update..
Verifying current system..
/dev/block/platform/msm_sdcc.1/by-name/system has been remounted R/W: reflash device to reenable OTA updates
E: Error in 0/cache/recovery/block.map
(Status 7)

Installation aborted.

I would really like to upgrade without wiping the data.

Thanks.

Samsung galaxy A5 USB Otg supported?

I have checked with few USB Otg checkers it said there are Apr are present in mobile. But i could not able to connect Pendrive. Many entry levels phones also have this feature. But this is recently launched metal body phone. I really wondered why this feature is not present. Any way to enable this?

retrieve logcat after a system crash

Is it possible to retrieve a logcat from before a system crash after the phone recovers? I.e. my phone is running normally, then it crashes and reboots, and I want to view the logs when it recovers to try to determine what caused the crash. I can't find any way to view logcat in anything other than realtime, except to have a terminal emulator running and execute logcat -f logcat.txt V, then just leave it running forever. That could build up a massive file that eats up all my storage.

I can't believe there's no way to view a crash report, I just can't figure out how.

Bluetooth Headset suddenly stopped using google now

I bought an LG Tone Pro HBS 750 about a week ago, and it's been great. The phone button, on the left, activated a Google Now voice prompt, even when the phone was off. However, this morning, it suddenly started using the Voice Dialer. I've been Googling for the solution to this problem all day, but all the results I can find are people asking how to enable Google Now voice actions. All the answers require downloading some kind of app, which I don't want to do because it clearly worked before. I've tried:

• Resetting all the app defaults. The button doesn't (and never had) prompted for a default action app


• Disabling Google Dialer. This makes the phone app unavailable, but the voice dialer still works


• Force stopping Google App. This seems to be the app that runs the voice dialer, but stopping it doesn't help. It can't be disabled.


• Unpairing and repairing the headset


• Resetting the phone with the headset on


• Resetting the phone with the headset off

This is on a Nexus 5 running stock Android 5.1

Data-Only USB Cable for Android devices

It is possible to manufacture a cable that transmits data but doesn't charge my device?

I already tried to cut the 5V wire, but after that no data is transmitted (Neither the device is charged).

Cutting the GRND wire apparently doesn't make any difference (Data/Charging works normally)

Reason: I need to check the phone battery consumption during some scenarios, and I need to send ADB commands to read battery value and input commands(Touch/Swipe/Open app, etc)

Can I install android 5 before version of "V20b April 7,2014"

I bought my phone almost a year ago even though I have been getting a message about an upgrade for a long time I haven't installed it. Now I want to upgrade my android . I notices its version V20b April 7,2014. So what should I do ? Is there never version of android I can install directly or I have to install the next version first than the version which has already installed.My current version is 4.2.2