Database Info

[Q] Firmware from different region?

Hi, I would like to ask if anyone knows if it is possible to update the transformer firmware manually with the files of a different region?
The reason I am asking is that I got my Transformer in Japan, and the update to honeycomb 3.1 is not released here yet. (its still 3.0)
Can I use the US, or WW firmware file to update without any problems?
I'm a little worried about losing functionality with the dock keyboard, since the layout for the Japanese model is a little different (different key-mapping).
Has anyone tried to do this?
Thanks!

yeah I really need to know this too. I love this tablet but the browser crashes alot and the keyboard is laggy plus the video is horrible and staggered both on youtube and from the memory so I'm hoping the update will fix this but for some reason Japan hasn't gotten the update which is driving me crazy
Cheers for a response in advance

So... has anyone tried this?
I want 3.1, but I don't want to brick my transformer (><)

You can try PRIME 1.5 version, It's more optimized than the stocks firmware. But other firmware should works fine.

thanks makec3rt
I don't know anything about custom roms. I read the post that you linked to. But, I don't 100% understand what the point of this rom is..? Why use it instead of the stock?
Also, am I likely to have issues with the keyboard layout if I install this? And what happens to the pre-installed apps (like polaris office etc)?

You can read the change logs at there. With PRIME 1.5, you will have root access, which allow you access/modify/remove stocks apps you don't wan't, and system files etc..and not limited as the stocks firmware.
Keyboard layout should works fine, you can always change keyboard layout in the settings.
All pre-installed apps are still there.

Hi guys! I've got the same problem: my EEE Pad is from Deutschland (Build number: HRI66.DE_epad-8.2.3.13-20110511) and THE ONLY language is Deutcsh (no other languages are available in the menu). MoreLocale doesn't really help.
Cause I don't know Deutsch at all I wonder if it's possible to change firmware for US/WW/CN or anything else that would have several languages to choose from.
And what I have to do for that.

Installing a foreign SKU will void your warranty, that's for sure.

[Q] Carrier apps Omnia 7

Hi there, looking for some more advice here!
Just took out a contract with Orange, and I want the orange apps..specifically 'Your Orange' so I can look at my account and such on the fly.
After doing a bit of research, I've found a few different bits of 'loose' information, with nothing significant really coming of them.
XAP - I am led to believe that the reason I can't just download an XAP is because the phone's ID's will determine wether the app can or can't load. Hence why I can't find a single .XAP of it online.
ROM Flashing - If I flash the Orange UK CSC with a rom will that work? If so, my next questions is how do I flash a CSC with the new custom Rainbow rom? I thought this might work, but then when I looked at my phone the H3G app still shows under Samsung Zone even though I flashed to a non-branded ROM and am now flashed to a unreleased custom ROM at the moment, but the H3G one still shows. I have never used a 3 sim card in this phone, but it is 3 branded. I thought flashing a different rom would get rid of that/give me the one I wanted (flashing with the orange CSC for example)
Registry Editing - I'm sure most people here now know how to get different manufacturers apps on their phones.
The key that sit next to it apparently control the operator apps.
HKLM\System\Platform\DeviceTargetingInfo\OemName
HKLM\System\Platform\DeviceTargetingInfo\MobileOperator
Does anyone wether this works, and if so what the Orange UK code is?
-----EDIT----
After looking at the ROMs, I've determined that Orange's code is ORA-GB. After setting this in the registry and doing a reboot I still can't access the Orange apps in the marketplace, and the H3G app still shows up at the bottom of Samsung Zone. ¬¬
Please don't tell me to search. You will literally find odds and ends like this - I search loads last night and today!

Take a look at my OEM Marketplace XAPs (thread linked in my sig). People have also posted the info for ccessing carrier marketplaces using that.
Oh, and you may want to revert the DeviceTargetingInfo registry values *RIGHT NOW*. At some point - I don't know how long it takes or what the trigger is - having those registry values mis-set apparently causes your marketplace DRM to break, and all your purchased (or free or trial) apps stop working. I only *know* it happens for the OEM value, but I would expect that it happens for the Operator too. The method used by the OEM Marketplace XAPs is much safer by all reports so far.

GoodDayToDie said:
Take a look at my OEM Marketplace XAPs (thread linked in my sig). People have also posted the info for ccessing carrier marketplaces using that.
Oh, and you may want to revert the DeviceTargetingInfo registry values *RIGHT NOW*. At some point - I don't know how long it takes or what the trigger is - having those registry values mis-set apparently causes your marketplace DRM to break, and all your purchased (or free or trial) apps stop working. I only *know* it happens for the OEM value, but I would expect that it happens for the Operator too. The method used by the OEM Marketplace XAPs is much safer by all reports so far.
Click to expand...
Click to collapse
Thanks man. So what I've gathered from that is that I need to change the XML file. I'm too nooby, any idea on how I can edit those on my Omnia 7? (now you can yell at me for not using the search!)
EDIT
Was just about to start editing me some XML's, when I realised I needed Adobe Reader. (Bare in mind I had already set my DeviceTargetingInfo back to 000-GB) loaded up WP7 marketplace, and at the top of the list, staring me in the face is Orange Selects. I don't know if its because I changed the DeviceTargetingInfo (but I changed it back and rebooted so how in good god...?) or if my Orange sim just kicked it into working after being in the phone for a while (only put the sim in 3 and a half hours ago) but yeah. It's working. So..thanks? lmao

It's the 3.5 hours one, almost certainly. The phone updates those XML files (the one my XAPs modify) automatically. In my case (in the US) I believe it happens around sometime in the night or early morning. That sounds just about right for the UK.

GoodDayToDie said:
It's the 3.5 hours one, almost certainly. The phone updates those XML files (the one my XAPs modify) automatically. In my case (in the US) I believe it happens around sometime in the night or early morning. That sounds just about right for the UK.
Click to expand...
Click to collapse
That's pretty cool, and interesting knowledge! I wasn't desperate for the apps so if I would have known prehand I would have just waited - I thought that I was never going to be able to get them! Thanks for all your help man, and seriously thanks again for those XAP's (used them quite a while back now) but they are really awesome.

Spookidoodles said:
That's pretty cool, and interesting knowledge! I wasn't desperate for the apps so if I would have known prehand I would have just waited - I thought that I was never going to be able to get them! Thanks for all your help man, and seriously thanks again for those XAP's (used them quite a while back now) but they are really awesome.
Click to expand...
Click to collapse
Sorry to resurrect the post, but I was wondering if you could tell me the contents of the mobile operator XML?

[Q] How to unbrand Samsung Focus

I am not sure how to unbrand my ATT Samsung focus so it can be an open market device and can recieve updates as they come?

Not sure what you mean by open market device?, but i do have a xap that will allow you to unbrand it and also rebrand it. By unbranding it does not allow you to see more in the market if that what your thought may have been?
If you are looking for a way to get to diff device market app then go over to here
http://forum.xda-developers.com/showthread.php?t=1393265
Click to expand...
Click to collapse

Unbranding allows you to receive updates (you know, like the OP said... the things that come over Zune) as soon as they are available. Some mobile operators don't release the updates on time, so you might have to wait weeks or (on occasion) months.
It's somewhat dangerous, though - if your phone is a mixture of branded and unbraded ROM components (some from stock, some from updates), it's in an untested state and there may be problems. If you re-brand after installing the update, you may later get an MO-specific update to bring your phone back onto the official update path... or you might not.
Also, if you want to force updates, there's another method that may work better: sending update CABs rather than doing the updates through Zune.

Yes i can understand the part ( and can receive updates ) just didnt know what he meant by " open market device " thanks for the clarity of the OP

"Open market" is a term used to describe phones which are sold un-branded and not SIM-locked. They're relatively rare in the US, but are the rule, not the exception, in most of the world. Open market phones are not customized for their carrier, so they may lack certain useful carrier-specific features. However, they also lack carrier mandated modifictions that may lower the quality of the OS (for example, AT&T removing the 2G/3G toggle option from their stock ROMs).
According to the guys at the Microsoft store, the Lumia 800 is only being sold open-market in the US, for example.

Ahh, i see said the blind man! Learn a little some new everyday.

unbrand
according your question,that's easy to done...
you have two choices to update the new version of OS,change to the phone registry or reture to 7004 version when your phone is running 7720,then flash the custom rom from dft(dark forces team),and your phone can update to 8107 or higher version of WP7.5 easily.

[UTIL][APP]Lenovo Security / LeSec app (anti-virus/spam/theft/firewall)

Edit: Important: The newer V4 version of LeSec may no longer be usable for non-Chinese speakers. See this post #17 here, also to discuss alternatives
For all you Lenovo users out there,
I wanted to (re-)introduce this application. Because I have the impression that many Lenovo phone users rather quicly move on to migrated ROM's from for example APKHOT/Smileyvvv/Etotalk etc, where this app is cooked out.
You may want to reconsider going back to it, if it will still work on your phone with whatever ROM you have. It is really a very useful utility:
Firstly, it is a virusscanner. Not sure how useful a virusscanner is on Android, and as I want to avoid that discussion in this thread, that is the last I say about it.
It is also anti-spam. You can black- or whitelist SMS and Calls. See screenshots for an impression. Very useful.
Anti-theft is there. Send SMS upon SIM change, or remotely instruct the phone to send location or self-destruct. I suspect, but did not try, the SMS instruction is stored in /system, so a data-wipe will not undo this. But a good hacker will fully flash, so it only protects against noob thieves, like all anti-theft apps.
But those are common functions, readily availible in other apps. But now for the interesting feature:
It has a firewall. If that is the correct name. Or an app-wall. An permission-wall? You know those apps that you download that for some reason want permission to send SMS? Why does it need that? Or why does it want to read my contacts?
Well, you can per-app decide to block a permission. This app does not need to read my contacts. That app does not need to send SMS. And it will show you if an app tried to anyway. How cool is that?
Guest- and Childmode. Hide some apps. After all, we do not want junior to see daddies tripple-X rated apps. Or the wife. Which is why you can also hide certain contact's and call-history entries (wink, wink). It may also apply to banking apps and your bookie, though that is a bit more boring. Oh, and in Child mode the radio turns of as we want to protect junior from radiation...
Some of you that use Etotalk or APKHOT ROMS may have noticed the notification area buttons to these last two that were dead because this app was missing.
We could of course worry about whether this app in itself is not a spy, reporting everything you do to the Chinese government. But you may not be aware that this is true for *any* Chinese clone you buy. Typically those clonemakers do not release the kernel or framework source, so such a spy would be in there, not in a de-installable app. And if you are really worried about it, make sure you get a phone where you can install CyanogenMod compiled from source.
Personally, I doubt either Lenovo or China is interested in me, and if they do it means they have a Infinitesimals bigger datastore to clog their machinery before they find something on people like Liu Xiaobo or Tenzin Gyatso, which is actually a good thing. But I suspect the app is simply without such sinister intentions.
Anyway, attached is the version I got from my phone. From a Lenovo A750 ICS 4.0.3 S306. But I suspect it works with any phone that uses the Lenovo Framework, so any Lenovo ICS phone that has a not too heavily modded ROM. It did also work on the ICS 4.0.3 Lenovo P700 ROW S113 (Rest Of World edition) edition.
I provide update.zip installers for MT6575 and MT6577 (because I know their partition table). It probably also works on Lenovo Framework phones based on MT6573/MT7513 or even MSM7227/MSM7527, maybe even GB ones. But then you need to take the two *.apk files from inside the zip file, and copy them manually into /system/app, as the update.zip installer will not work for that.
But do try, and please report back if it does or does not work on your phone/rom. There is also an uninstall package. Oh, and you are messing with /system, so as always, at your own risk, ensure you can always flash back a working ROM or have a Nandroid backup before you experiment.

Your zip didn't work on my A789, which is using the apkhot based rom available on forum.china-iphone.ru. After extracting the apk files, copying to /system/app and manually setting permissions, it's working like a charm.
Thanks, I really missed it. On the most recent cooked roms, I miss many things available on the Lenovo official ones, like the fm transmitter, or the butterfly-like widget on the default home screen. Some cookers tend to leave out any non standard apps without even taking some time to know what they do. Not all Chinese apps are rubbish or impossible to understand, and Lenovo is a serious company.

Ok, here you have the FM radio and transmitter of the A789, but it probably does not work, as it is Odex'ed.
And I uploaded seperate installers for MT6575 and MT6577
Also, on your APKHOT, please confirm it actually blocks permissions and blacklists SMS. I am not sure how much the APKHOT deviates from the Lenovo Framework, so merely being able to install and configure may be too soon to tell.
PS: why not try my factory-cleaned A789 ROM? It comes with all those apps by default, and I now have 3 positive feedback.
Come to think of it, why did I take this security app from A750, when A789 is newer....
Edit: Because they are both the same version. In fact the LeSec has not changed since Dec 2010, according to the internal dex binary.

I have tested call blocking and it works, but it isn't so important, since call blocking is a built in feature of the Mediatek framework. You can block calls from any contact you have on your Google account just out of the box, and it works great. I've tested older phones which used older Mediatek chipsets and that feature has been part of the Mediatek framework since MT6573.
The FM transmitter won't work that way, since it is odexed. But it doesn't work deodexed, either. I've just got a deodexed version of the app, thanks to a friend from another forum, and it doesn't work very well. It works, but I had to stick the phone to the antenna on my radio in order to hear something. People I've talked to say that the transmitter works great on the stock Lenovo roms, so maybe it's just some incompatibility with the apkhot roms.
The only reason I'm not using your rom (which I have downloaded) is that I wanted to setup the phone in Spanish, and the rom I'm currently using is the only one I've found which contains that language. Just a quick question: is there any noticable performance increase on the s227 based roms? If so, I don't care using the phone in English, since I just want the most feature rich rom.

Thinking it twice, I've remembered another reason. One of the things I like most about the apkhot rom I'm using is that the external sdcard is mounted on /sdcard and not /mnt/sdcard2, which avoids problems with many apps. I tried one of the newest apkhot roms, based on s227, and none of the tricks to exchange /sdcard and /mnt/sdcard2 worked with it.

I'll reply to that in the A789 thread, as we seem to deviate from the security app.

cybermaus said:
Edit: Because they are both the same version. In fact the LeSec has not changed since Dec 2010, according to the internal dex binary.
Click to expand...
Click to collapse
I remember there was an update of that app on my A750 with your ROM. Now with apkhot I installed that package posted above and I have the older / original version. But there is no update offered...

That was probably on the S148 Gingerbread ROM. That one has an older version. I know, because I messed up trying to install it, as I had that older GB version and the new ICS one both in my Titanium backup. Also, the Dec 2010 date is probably false, I just got OTA ROW_S114, and it too had all files timestamed to Dec 2010. But I am certain the LeSec from S306 and S227 are the same, the binary compared identical. Official version is V3.5.1.3.5.2.0041 and the update button tells me there is no newer.
Every so often it does update the virus/blacklist signatures, but that is not the app itself. Current virus signature 2012.09.14 Current harasment (blacklist) 2012.07.11
But if you find a newer one, please do let me know.

I've been trying LeSec further and it works, but I found a problem I wasn't able to fix, so, until I found a solution, I've freezed it with Titanium Backup. The problem is that I'm using Go SMS Pro, instead of the default messaging app, since I need to write SMS in Spanish and the default app doesn't support Spanish characters like accents, etc. Go SMS Pro works, but every time I send an SMS, LeSec thinks an unauthorized app is trying to send an SMS in the background, and shows a popup to let you decide whether to allow it or not. I haven't found a way to disable that, and it's a bit annoying having to click two buttons everytime I want to send a message.

Its probably a silly question, but you did go into LeSec->ChargeShield-SMS and ensure that your app was allowed to send SMS in background?
Probably for reasons of 'likely form of attack' the SMS apps are (unlike other permissions) by default in a 'Warning' setting, but if the warning does not come to the foreground on your phone, it may simply not work.
Also, rather than freezing LeSec completely, you could go into ChargeShield, and simply turn of the ChargeShield.

cybermaus said:
That was probably on the S148 Gingerbread ROM. That one has an older version. I know, because I messed up trying to install it, as I had that older GB version and the new ICS one both in my Titanium backup. Also, the Dec 2010 date is probably false, I just got OTA ROW_S114, and it too had all files timestamed to Dec 2010. But I am certain the LeSec from S306 and S227 are the same, the binary compared identical. Official version is V3.5.1.3.5.2.0041 and the update button tells me there is no newer.
Click to expand...
Click to collapse
No, I used the S148 just some days and updated to your S306 V1.2 and simply stayed there, because it works very well. After some time it offered me an update and the user interface changed a bit with that update. The way how you set privacy on app level and so on. The update button itsself never worked for me either.
Sadly, backup never worked on that rom. I found that out as I wanted to try apkhot. To be honest, I didn't try on apkhot, yet.

A few minutes ago, I was offered a 4.1.4 version and installed it. Now it's purely chinese
Maybe I have to reboot the phone for english...
From the design it is a version newer than the version I wrote about...

leFloyd said:
A few minutes ago, I was offered a 4.1.4 version and installed it. Now it's purely chinese
Maybe I have to reboot the phone for english...
From the design it is a version newer than the version I wrote about...
Click to expand...
Click to collapse
Well, before you put the old one back, safe this one for me will ya.

cybermaus said:
Well, before you put the old one back, safe this one for me will ya.
Click to expand...
Click to collapse
I don't want the old one back - I want this one to be english
How do I save it? Any idea where it has downloaded it's update? This was done within the app...

Well, it would have simply replaced the two apk's in the /system/app folder.
So look for:
LenovoSafeCenter.apk
LenovoSageWidget.apk
or something similar, it could have changed its name, or added a 3rd component.

Got the files?
Sent from my Lenovo A750 using xda app-developers app

Well, it seems that Lenove Security (LeSec for short, and LenovoSafeCenter officially) is becoming less usuable. As mentioned above, it is fully Chinese, no Engrish anywere.
I had a look at the new V4 of it, even decompiled it. Not only 100% Chinese, but is hardcoded in the app, there are no resource xml files that we could translate. A big pity.
Also, there is one app (Waze, a social car navigation app) that in the latest version is incompatible with LeSec. Though it is at this moment the only incompatibility I ran into, it is also a pity.
That may mean we need to find an alternative:
For now, these two has shown up:
LBE : Somehow, I think LBE is actually the company that makes Lenovo LeSec. Or at least, there logo is shown in the about menu of LeSec as part of the "in cooperation with" mentions. Maybe the reason why the free LeSec is limiting itself?
Anyway, I am trying out LBE at the moment, to see how it works.
pDroid : pDroid looks promising. Specifically, they are promising ICS support, but right now, only GB, so one to keep an eye on, but not availible to us just yet.
Permissions Denied : A Paid app. But if it works well, it may be worth it. Not looked at it yet.

So, LBE seems to work well. It does not have the hiding of apps for 'child mode' and 'privacy mode'. Nor does it have the 'anti-theft' or 'virus-scan' but it does the permissions thing well.
I tested, it nicely prompted/blocked permissions. And to be honest, using a slight more clear interface. If it is permissions, which was indeed what I was after, LBE seems to do the job. I also like I can block internet use separate for 3G and Wireless. Very useful.
One problem though: Waze is failing in the same way as with LeSec. Even if I make it a 'trusted' app. It seems the latest version of Waze simply does not like to be looked at too closely.

anti theft
I cannot input number In anti theft . for ex if I write +35989xxxxx I need two more digits but it does not allow it. If I write in national format 0899.... I have to write more digits than the phone number has. Any solution?

As mentioned, while I started enthusiastic about LeSec, it is now focussing too much on China alone. Not as good internationally.
Try using one of the other anti-theft solutions.

Does it worth to update TF300TG if you need it for work?

Hi all,
As you may assume, I'm the owner of an ASUS TF300TG, since summer'12. During this time, I kept the device updated only with official ROMs. This leads to have currently Android 4.2.1 with what I consider low performance. This pushes me to think on a new ROM, maybe KatKiss with Lollipop or Marshmallow, or even Xubuntu.
The things that take me back from this are the following:
1. I use this device to connect to my company's network. The policy for connecting to such network is no root and no jailbreak. Would it be possible to install a rom without root? I assume so, indeed xubuntu should be recognized as Linux PC.
2. I'm not a programmer, but not only a user. I have installed several PC (window and linux), and flashed once a mobile phone. I'm able to open a command line window and write some commands. But I started to read the xubuntu post, and I wasn't able to follow the messages (at least, the first pages). Is there any place to follow the detailed steps to install a new rom?
3. I would consider a pitty to loose the 3G functionality. Here, I find some kind of contradictions.
a) http://forum.xda-developers.com/transformer-tf300t/accessories/tf300tg-rom-3g-t3270011
Here it's said that asus hasn't released the source code for the 3G module.
b) http://forum.xda-developers.com/showthread.php?t=2190847
But there's also the xubuntu post, that is stated (if I understood it properly), that 3G module is working. This totally misleads me...
4. After all this, will the effort worth it? I mean, I don't know if the performance improvement will be enough to make up the risk of loosing functionality (or even make it as usable as a brick). I saw some videos over Marshmallow, and it totally encourages me (have to further consider three topics above); I don't find some over xubuntu, and I don't see them so promising...
Thank you in advance for your time reading and answering. I expect your coments [emoji1]
Enviado desde mi ASUS Transformer Pad TF300TG mediante Tapatalk

After more than 150 reads, and no reply, I asked myself what went wrong. I realized that a post with title "Update for TF300TG" that maybe most users would open the post only to check if the there's any update they would like to know. That's the reason why I edited the title into something that avoid misleading.
If this is not the reason not to answer, please let me know.
Regards.

Update TF300TG?
I think you answered your own question in #1. You need it for work, unchanged.
If you were to do anything in the way of changing your ROM, even to xubuntu, then your TF300 would need to be rooted.
Your Asus is old and slow. Nothing you can do will change that.
Maybe you need to get something new and much faster and use it for work.
Then you will still have your TF300 to play with and learn how to root and change roms...
just my opinion,,,, Bob

YMMV but not many custom TF300 ROMs actually lead to a performance gain in the long term (although most may seem very fluid on first few uses). Mostly what they provide is a way to run a more recent Android version on the aging TF300. Gray-Beard phrased this painfully well. It's old and there's nothing you can do to change that.
At the end of the day, Cromi-Xenogenesis 5.4 may just be the best TF300 ROM around. It's great, but make no mistake: this also is just Android 4.2.1
I must say this company policy of "no root, no JB" is absolutely ridiculous. Not only do I doubt this to be verifiable from network perspective, but is the infrastructure THAT insecure that your machine-local EP may pose a security threat to the extent that such a policy is pertinent? And if there IS a BYOD mechanism in place, what happens if you have a windows machine with local admin? Is that also a big no-no? I mean ,God forbid you should have EP on your own bloody device....
On the other hand, xubuntu (or most other linux) isn't that great on TF300, you won't be able to run recent Xorg due to limited ABI support of NVidia's closed-source Tegra3 drivers (thanks NVidia!), probably won't be able to use kernels beyond 3.1.10 (if you do then pls show me how) and the whole thing is just not that stable.

chemizt said:
YMMV but not many custom TF300 ROMs actually lead to a performance gain in the long term (although most may seem very fluid on first few uses). Mostly what they provide is a way to run a more recent Android version on the aging TF300. Gray-Beard phrased this painfully well. It's old and there's nothing you can do to change that.
At the end of the day, Cromi-Xenogenesis 5.4 may just be the best TF300 ROM around. It's great, but make no mistake: this also is just Android 4.2.1
I must say this company policy of "no root, no JB" is absolutely ridiculous. Not only do I doubt this to be verifiable from network perspective, but is the infrastructure THAT insecure that your machine-local EP may pose a security threat to the extent that such a policy is pertinent? And if there IS a BYOD mechanism in place, what happens if you have a windows machine with local admin? Is that also a big no-no? I mean ,God forbid you should have EP on your own bloody device....
On the other hand, xubuntu (or most other linux) isn't that great on TF300, you won't be able to run recent Xorg due to limited ABI support of NVidia's closed-source Tegra3 drivers (thanks NVidia!), probably won't be able to use kernels beyond 3.1.10 (if you do then pls show me how) and the whole thing is just not that stable.
Click to expand...
Click to collapse
I will share my experience.
I'm on the Cromi-Xenogenesis 5.4, with standard configuration I got a flawless system at the begging, but after few months I got a laggy device, so then I made a full wipe then I reinstalled everything from the scratch. I did it two times in 2 years.
The last time, before I was willing the third wipe, during first days of January 2016, I tried to make some change in the config with Kernel Adiutor and Developer option.
In kernel Adiutor:
- Governor CPU: perfomance
- Internal Memory => Scheduler: cfq
In Developer option:
- disable animation: Window animation scale, Transition animation scale and Animator duration scale
- force rendering on GPU.
Other important suggestions could be:
- use stock browser
- use Nova launcher
- use Twlight for night use (it's a red filter for screen)
- use Swifteky and reduce the keyboard dimension
- use Adaway to remove useless banner
- kill autostart app (like Amazon, Aliexpress, Weather app... etc)
Now maybe my little guide it's useless, but I have a usable tablet still in 2016 for Web, Gmail, little editing of documents, Telegram, Imgur, Youtube (maybe it has little problem here) and Netflix.

I tried KatKiss 6.x (don't remember the exact version number) for TF300T without 3G, then installed "ppp widget 2" (or "ppp widget 3"?) from Google Play and started 3g manually from this application (widget). Android will not automatically switch from Wi-Fi internet to 3G internet (as like in stock), you must switch it manually. Some bugs discovered, for example, I could connect 3G and disconnect only once, when I want to connect 3G again, I had to reboot. device. Maybe will work on some other firmwares?