nexus 5 - How do I get my mobile data to work again, after the new Android 5.1 update?

I am having an issue with Mobile data no longer working. Mobile data WAS working the day after updating to Android 5.1 on my Nexus 5. But now (1 day later) it is not connecting to Mobile data. It just has the cellular icon, with an exclamation point. I've tried toggling data, airplane mode, wifi, rebooting, factory reset, and reseating the sim card. I've even tried hopping on one leg while chanting this new update blows!!! The last thing I tried is to call my carrier and go through 2 hours of troubleshooting. They said the only thing left for them to do is send me a new sim card. It makes no sense. Everything else works fine. I can make and receive calls. Texting works. And Wifi works as well. Just not the mobile data. The weird thing is that it stopped working on the first day of my mobile data cycle. But the carrier swears that all is well on their side. Someone, please rescue me!!!

logging - Can I delete the log files on my device?

I'm currently developing on an Android 2.3.4 device. I've got root access to the file system, and I'm looking for the location of the system log files (like /var/log) so that I can delete them, but could not find these files on Android.

Does someone know where these files are located?

Does android, specifically the HTC Incredible, support headphone volume buttons?

Coming from the IPhone, I love being able to control my phone from my wired 3 button headphones. Center clicking to start/stop music or answer calls and using the 2 volume buttons to adjust the volume without pulling the phone out of my pocket.

I've tried different 3 button headphones with my HTC Incredible and can answer calls and pause and play audio with the center button, but I've never been able to change the volume from my headphones buttons.

Are volume adjustments via headphones supported in the HTC Incredible? Am I just using the wrong headphones?

samsung - After Factory Reset, Android Galaxy Camera Touchscreen is unresponsive

I met the weirdest thing I ever have. I have a galaxy camera gc100, It works very well without any problems. Since I decide to lend it to my friend, I did a factory reset. After the factory reset, everything looks fine and the initial setup screen "Select language" appears. BUT, I can not touch anything on the screen. It seems that the touch is simply unresponsive at all until the screen turns off by timeout. And then I tried (1) hard reboot, (2) go to Maintenance boot mode by pressing power and zoom out and did delete cache and factory reset again. (3) flash stock rom. (4) take out of the battery and then holding pressing the power button for more than 1 minute and then insert the battery and boot. (did three times). But none of them works. This is just weird and I can not find anyone on the Internet having the same issue as me. Other people met unresponsive touch screen and then did hard reset to fix the issue. Mine is entirely opposite. I don't have any problems, but factory/hard reset causing the touch screen is unresponsive at initial setup screen. Do anyone have any clue how I can workaround this issue? Thanks a lot. (Btw the system is still functioning because I can adjust volume and take screenshots by using the physical buttons).

Edited1:

I can use Smart Switch to access the galaxy camera's file system.

Edited2:

Whatever. This is just the weirdest thing I ever have in my life. I will never and ever buy a Samsung product again. I can't imagine a proper factory reset inside settings GUI can cause a problem in my life before Samsung.

Samsung Galaxy S III (S3) Won't Connect via USB with Android File Transfer with MacBook Pro - Mountain Lion

I saw some similar questions along these lines with newer Samsung devices, but I will post a question here anyway in case an answer for me ends up being an answer different than that for someone else. I have not seen a post concerning my particular phone, Mac hardware, and Mac OS.

Problem:

My Mountain Lion MacBook Pro (10.8.3) doesn't recognize my Samsung Galaxy S3 (4.1.1) for file transfer over USB. I am trying to use Android File Transfer, having been promised that it would solve all my woes.

The Situation:

I've downloaded Android File Transfer, and, when connected with my device, the app launches, but it just continues to demand that I attach the USB cable and or restart my device.

What I've tried doing:

Settings > Applications > Development > USB debugging

When set to on, nothing happens. When set to off, nothing happens either. I've turned it on, then on and off, then off, and restarted before, during, and after connection, and every combination possible. The result is the same: app launches and then gives error message.

USB Cable:

I've tried with two different new cables and the error message is the same.

Connected to a Windows device:

My phone is recognized just fine by my desktop PC running Windows 7. The phone is recognized and the SD card is recognized, and I can transfer files between them. However, my Windows device is not my primary computing device, and I am frequently away from home (otherwise, at this point, I would chuck the Mac and that would be that).

As with the person who posted a similar question about the Galaxy S2, please do not post answers suggesting the use of Kies, Bluetooth, Wireless, and the like unless they lead to me being able to use Android File Transfer via USB. I want my phone to work over USB and with AFT for a reason (speed, convenience, and better synchronization). Kies seems to be the default suggestion to solve this issue, but it is terribly buggy and it accomplishes file transfer much the same way that nuking my house would get rid of spiders. (Always good to have a little levity at this level of frustration.)

applications - New phone: How to transfer game progress?

I'm planning to buy a new Android phone and I'd like to be able to transfer the progress I have made at several games to the new device, so I won't have to play all the levels again from scratch.

I currently have an HTC Desire and will buy an HTC Evo 3D.

There's probably no simple/general solution to this.

But I was wondering if anyone did something similar and could provide some advice (e.g. where to look for files that might hold game progress information).

Answer

There are two places you should look for, the external memory (SD card or a directory that is used for similar purpose) and the internal memory (the /data/data directory). You may need to be rooted to access the latter.

In the best case scenario, the game saves all your progresses in the cloud, then you just need to reenter your login and it's all restored. This is typically only the case for online games.

Some games may provide a menu to export the save data or an external app to do so, if they exist then you should preferably use them.

sd card - Why did /sdcard/ turn into /sdcard/0/ with 4.2?

I've never seen this before so I'm assuming that it happened when I upgraded to 4.2: I'm fairly certain that /sdcard/ used to take me straight to my sdcard, but now when I go to that path (in CWM recovery for example) I need to go to /sdcard/0, there's also /sdcard/legacy knocking about suddenly.

What are these folders and why have they appeared?

Answer

That has to do with the Multi-User feature enabled with JellyBean 4.2 (not 4.1). In order to handle separate accounts, parts of the directory structure had to be changed. /sdcard/legacy e.g. always points to the currently logged-in user's sd card directory.

I currently cannot find the document where I read the details, so I cannot link any source. But with the above in mind, it's easy to guess that /sdcard/0 will most-likely be the device owners (or "first users" -- the "first user" always becomed the "device owner", only this user can create additional accounts) sd card, and so on. I will add a link to a source as soon as I can find it.

EDIT: One of the pages I got that idea from is AndroidNext. 1droid gives a different explanation when it comes to sd card:

With Android 4.2, Google introduced multiple users as a new feature. In order to accommodate multiple users, Google is now giving each user a their own folder for storage. If you upgraded to 4.2 from 4.1, then the 4.2 ROM will look for a certain file in /data to determine whether it needs to migrate all of your files to the new multi-user data structure. By default, 4.2 migrates all of /data/media to /data/media/0.

A problem arose though with custom recoveries. A custom recovery retains the /data/media folder during a factory reset. When you factory reset and then boot a 4.2 ROM again, the 4.2 ROM will migrate everything in /data/media again. It will migrate your files every time you factory reset. This multiple migration is what resulted in some people having their files moved to /sdcard/0 or even /sdcard/0/0 etc.

So it has in fact to do with the new Multi-User feature -- one way or the other.