yashsingh1/xdaforums huggingface dataset:
[Upgrading, Modifying and Unlocking] radheesh_xda:
Hello,

i have found this CWM recovery for zopo 998

worldwideweb.blog.geekbuying.com/index.php/2014/01/20/cwm-recovery-for-zopo-zp998-mtk6592-octa-core-smart-phone/
[Upgrading, Modifying and Unlocking] radheesh_xda:
How many battery you got along with this Zopo 998
[Upgrading, Modifying and Unlocking] slekkas:
This is weird and kind of got me worried : http://www.gizchina.com/2014/01/22/zopo-zp998-2gb-version-will-go-sale-valentines-day-china/

Why does it say that the 2GB is coming out in valentines day? Gizchina is a reliable website.
[Upgrading, Modifying and Unlocking] tommie.r:
I did my best to copy your solution, i just didn't dokument it since it wasn't working for me. The photo just shows my own strip, i'll fiddle around a litle more and se what functions and not.

Seemed like an aluminum frame to me, but it wasn't. (Silly me) Don't know why snr goes up. Likely the angle on the foilstrip. I wonder if it could be a good idea to put a strip along the frame on top? I'll try tomorrow.

The screenshot is outdors, and it goes up and down, but i generally get a fix arond three to five meters accuracy.

Found an app to ceep gps on when screen is of, "gps keeper" it's called.
[Upgrading, Modifying and Unlocking] sheepytoo:
GPS?

Hi all,

I have been watching both this forum and the thl t100 forum trying to make my mind up as which to buy.

The problems with the GPS on both phones is a concern as I use maps in the car an awful lot,

I have come across a post on another forum by thl themselves that is a "fix" for the GPS troubles and wondered if they do indeed work and if the same "fix" can be applied across the mtk6592 range?.

Here goes.

This is for anyone having THL Mobile Phone GPS Issues

Before you start the procedure you need:

1. Rooting - This rom is rooted.

2. Get Mobileuncle Tools from play store

3. Get GPS Test from play store

4. Get Root explorer from play store or internet.

Procedure should be done outdoors:

1. Turn GPS off on your phone.

2. Open Root Explorer and find the mtkgps.dat file in /data or /data/misc

3. Delete mtkgps.dat

4. Reboot phone

5. Open Mobileuncle Tools

6. Tap on 'Engineer Mode'

7. Tap on 'Engineer Mode (MTK)'

8. Scroll across to 'Location'

9. Tap on 'Location Based Service'

10. Tap on 'AGPS' and then make sure 'A-GPS On/Off' is checked

11. Tap on 'EPO' and then make sure 'Enable EPO' is checked

12. Swipe down (notification bar) and turn GPS on

13. Hit back and then tap 'YGPS'

14. Wait until you get position lock (mine took about 5 seconds).

15. This process should create a new mtkgps.dat file.

16. Hit home button and open GPS Test.

17. You should get a position lock reasonably quickly.

Can anyone who tries it give feedback please, it might help me make up my mind which to buy
[Upgrading, Modifying and Unlocking] tommie.r:
More gps.

Well, yesturady i sat on my porch in the sunshine and tested a lot of different external director antennas, and found a practical solution that works for me. It turns out the simplest one was the most practical. Next step for now will be to build an antenna on my carholder that doesn't look like something the cat dragged in. I tested my car antenna for a longer drive to my work, about 40 kilometers and it works ok even in town. So i will wait and see how it goes for you others out there who experiments with this. The results comes below...:cool:

Ohh, by the way, as lasslax pointed out the frame is plastic and not conductive. The claim i made about the connection beeing better i couldn't repeat. It was most like just coincidense that the signal got better. I also noticed yesturday that the angle my foil strip has is very important for the result, it 's most likely that the angle changed when i folded the strip arond the frame.
[Upgrading, Modifying and Unlocking] Take-kun:
I'm out with this phone's GPS. Just bought the external Bluetooth Holux RCV-3000.

Now the only left is to find out how to use it in ingress, since it won't run while Mock locations enabled. Hope I will find something.

How about cyanogenmod for mediateks? Especially this phone. Anyone knows?
[Upgrading, Modifying and Unlocking] youngchaos:
no way to do cyanogemod without source codes.. so it's all in mediatek hands..
[Upgrading, Modifying and Unlocking] lasslax:
My recommendation after several phones with MTK processors: if you need GPS, do NOT buy any phones with this processor / SOC.

Also, consider to buy a phone with both GPS and Glonass
[Upgrading, Modifying and Unlocking] Mawe79:
this fix works for all kinds of mtk phone, not only for nt6592

but it won't solve the HARDWARE problem of the zp998!
[Upgrading, Modifying and Unlocking] kutulu32:
I would like to ask some questions before I apply the last update. Functionality of mounting ntfs drives with the help of paragon ntfs is still possible with the last Update? Also I would like to ask if someone uses external USB dac with zopo. With the first update and the help of USB host diagnostics app a patch is applied that makes the use of USB audio player pro with external USB dacs( I own fiio e17 and I use at the moment) possible. The only bug is that the default audio player from zopo doesn't work while USB audio player is installed. In my case it doesn't matter because audio quality of zopo own dac is very awful.
[Upgrading, Modifying and Unlocking] khouryh:
thanks for the info its a little late for me, is there a way that the issue with the GPS will be resolved? i will go back to my nexus 4, the GPS never disappointed me! i like the zp998 and will keep it for a while maybe the GPS issue will be resolved...
[Upgrading, Modifying and Unlocking] lasslax:
Since the problem is hardware related, I don´t think it will ever be resolved.
[Upgrading, Modifying and Unlocking] khouryh:
i think it is more SW related since the GPS test on this device can see only 12 satellite,and lock uses 7-10, with 25-39%.while the nexus 4 sees 21 uses 12 with 15-27%...the Zopo is more accurate, but the problem it loses connection for 5-20 sec 5 times during 1.5 hour drive... so i think it is SW related.
[Upgrading, Modifying and Unlocking] lasslax:
You think wrong...:)

If you read a little bit the last 10-15 posts here, you'll see, that by improving the signal strength, the GPS works fine - with the same software.

You can also read about WHAT is the problem with the hardware.
[Upgrading, Modifying and Unlocking] khouryh:
thanks for your kind response,

I just did the reading and seems like you are correct there is an issue with the Antenna, but still i think there is something with SW too, since the signal is good in most cases and i lose it for few sec and then its back! (i might be wrong) but i will try the work around since i like my phone...and i wanted it to look good too, else i will consider going back to my old nexus... i will keep both for now!
[Upgrading, Modifying and Unlocking] nikitailor:
ZOPO 998 GPS not work :(

Myne ZOPO 998 GPS not working too :( No one satelite can`t fix. How I can fix that problem ???
[Upgrading, Modifying and Unlocking] lasslax:
Unfortunately the software can not compensate for the weak signal. You must understand how the positioning works. First you need the distance to at least 3 external points (satellites), then by knowing the satellites position in a given moment, your position can be calculated.

So how to find out the distance?

Every satellite sends a radio signal to identify itself, and for the measurment. The signal is individualised sequences, starting at a certain predefined time. By simulating the same signal in the GPS chip, started at the exactly same moment, the delay of the satellites signal compared the simulated will give the distance. Now we are talking about fractions of a nanosecundum delays. Apparently, the accuracy depends on how the signal can be read. Of course, the more satellites to listen to, the better the accuracy, so it is also important how many satellites are used, but the most important is the quality of the signal, to measure the moment of the tops of the waves. The signal is very weak, and there is a lot of noise in the backgroud, sometimes suppressing the signal. For a usable signal, it has to raise at least 30-35 dB over the noise, for stability you need over 40dB. The crap antenna in the Zopo 998 can´t produce that. Paired with the unshielded lead to the cheap preamplifier, on the motherboard can´t mean anything but crap signal/noise ratio.

No software will help that.

Having said that, there are of course methods to refine the positioning, like predicting the next position. If the position suddenly changes giving an unlikely speed, the new position could be recalculated or ignored in waiting for a more likely one. I guess that is what Sygic navigation does, and by that way less sensitiv for the crappy GPS. But it does NOT make the positioning better, just covers the disturbances.

The only remedy at this time is an external help to better signal, as it is described by tommy.r and me. If you have a car holder, then it´s easy to fix. But if you want to use the GPS for jogging and measureing your achievement - no way, just forget it!
[Upgrading, Modifying and Unlocking] tommie.r:
Read posts from #531 on page 54 and forward and you will find information on what to do, but it requiers that you dissassemble your phone and build a better antenna as discribed in the following posts on the following pages. I have a ok working gps now both in car with an extra antenna and outdoors for tracking my walks etc, but i have to have an app running thats called gps keeper when i'm not on charger. Otherwise the gps goes into powersave when screen locks.

Interesting reading, i learn a lot from you in general when it comes to gps and how things work, thanks lasslax.

I actually get a god enough fix for measurement purposes now, but it takes a few minutes before my fix stabelizes. As long as my gps does not go into powersave it works ok. Considering how much i have learned the past weeks i couldn't have bought a better phone:o. Since i enjoy solving problems, buying a problem phone wasn't all that bad.
[Upgrading, Modifying and Unlocking] lasslax:
You are most welcome. I also appreciate your feedbacks about the GPS antenna.

And if you find a solution for the useless DAC that makes the use of a headphone to torture....please, let us know!
[Upgrading, Modifying and Unlocking] tommie.r:
No other solution than sony mw600 bluetooth headset. Works lika charm and good sound quality with my koss sparkplugg phones... And viper4android of course... :laugh:
[Upgrading, Modifying and Unlocking] noflip:
No, its not. The phone is terrible, but people in this thread seem to focus only on the GPS issue and ignore all the posts for the other problems.
[Upgrading, Modifying and Unlocking] khernitzz:
touche
[Upgrading, Modifying and Unlocking] coukou:
Please Advise

Hello

I am new to this thread. Please don't hammer me.

I just bought the zp998 and started to read at least 100 posts on this subject, when the main problem is the GPS... Too Late.

1) Before upgrading my phone, I'm looking for a ROM backup/Restore, what tool to use and what link?

2) Regarding my zp998 version (see image below), what the latest drivers, Root, FlashTool, ROM and files to install what the best method to follow?

3) What the minimum upgrade, if I decide keeping my Original ROM (drivers? Root? files?...)

4) Finally how do I check my GPS status? where's the tool?

I'll appreciate any help

Regards
[Upgrading, Modifying and Unlocking] tommie.r:
You will find loads of roms, root info and recovery img:s on needrom.com. Gps test is an app i use and like, but you can also use mobile uncle to check gps. There's lot's of gps testing apps on playstore. I used a one click rooting app on my computer and once i got root acess i installed cwm recovery img with mobileuncle tools. I'm on marsapa rom v8 now. Works ok. I'm farly new to this rooting stuff...
[Upgrading, Modifying and Unlocking] coukou:
TNX tommie.r for the advices.

However, what GPS test you use, so that I can compare mine to yours.

Anyway I'll give a try
[Upgrading, Modifying and Unlocking] nikitailor:
Bad GPS

Thank you :)
[Upgrading, Modifying and Unlocking] tommie.r:
Gps test

This one i have installed and like...

https://play.google.com/store/apps/details?id=com.chartcross.gpstest
[Upgrading, Modifying and Unlocking] Nibiru2012:
I have just received my ZP998 yesterday from Shenzen China. It a total of 5 calendar days from date of order to delivery at my house by DHL Express.

Works great! AnTuTu score of 27640 and my GPS works just fine. I hope it stays that way.

Connects to my AT&T Straight Talk SIM card with a WCDMA connection @ 3G speeds.
[Upgrading, Modifying and Unlocking] coukou:
H E L P can't root my zopo

Hello,

Although I’m using Win7, I followed step by step this tutorial . needrom. com/ mobile/ zopo-root-recovery/.

I could install the drivers [Device Manager] / Ports (COM & LPT1) / MediaTek DA USB VCOM Port (COM5)

So I used SP_Flash_Tool_v5.1348.00 … selected MT6592_Android_scatter.txt, added recovery.img and the modified boot.img … start flashing and got V check (success).

I put back the battery, switched on the smartphone then connected it to the computer. Although the computer show 2 extra removable disks, I’ve no access to. I get “insert a disk into your reader disk” message.

At the zp998 side I can’t [settings] / USB computer connection / Media device (MTP) selected option as shown in the her above tutorial

At my computer side [Device Manager] / Ports (COM & LPT1) / MediaTek DA USB VCOM Port (COM5) disappeared and replaced by [Device Manager] /

Android Phone / Android ADB Interface

I'm Stuck here since yesterday :(

I'll really appreciate yr help
[Upgrading, Modifying and Unlocking] tommie.r:
Do you mean you can't root or have got other problems?

I used this method.

http://colonelzap.blogspot.se/2014/02/how-to-root-zopo-zp998-mt6592-octa-core.html
[Upgrading, Modifying and Unlocking] coukou:
TNX tommmie.r for yr help.

What I'm trying to say is my phone is recognized as an "Android ADB Interface" when it's connected to my computer (see image bellow).

So, I used yr here above method http://colonelzap.blogspot.se/2014/02/how-to-root-zopo-zp998-mt6592-octa-core.html, installed VRoot (rootds.exe) and checked it by Root Checker which return "This device has root access!"

Still the access phone SDcard is denied. I can not copy SuperSU.zip to the phone SDcard. Moreover, Win Explorer doesn't show device name like zp998 or 9520. It shown just SDCard device.

Also, I can't find in my phone "USB Computer Connection" option to set it as "Media device (MTP)" (see image bellow). It is the problem?

Any suggestions?

Regards
[Upgrading, Modifying and Unlocking] casca:
hello guys, I've got a THL t100s that basically uses the same hardware, MTK6592.

Has anyone been able to resolve the magnetic sensor issue on the Zopo? The one with the inverted axle? this minor bug makes gps navigation totally unreliable since it uses the informations from that sensor as a vector to calculate routes.

regards
[Upgrading, Modifying and Unlocking] conanecu:
Hey, try this options. First Install from Google play airdroid then you can transfer via Wi-Fi, or you can send the zip file to your mail. Use the email client from your phone and download the attached file. Or, take the microSD card out from the phone and with an SD adapter insert it in the pc. For future transfers you can use airdroid.
[Upgrading, Modifying and Unlocking] Blue_Monk:
I noticed the small issue when using the compass in vertical position but when when using iGO9 i have no problems.

Navigation works like a charm and position locking is fast most of the times ( having some trouble in areas with big building but that is normal).
[Upgrading, Modifying and Unlocking] coukou:
TNX but it is not what I'm looking for :( Moreover, my computer doesn't locate my phone via Wi-Fi.

I want to transfer files to/from my computer and phone.

Regards
[Upgrading, Modifying and Unlocking] casca:
thank you for your comment!

I've googled the web and came up with a bmm056d compass fix from a guy in indonesia, I think the compass behavior is better now but the z axis is still incorrectly set and if I raise the phone vertically the main problem is there.

for now all I have is the attachment and what we need to do.

place it in /system/bin through root explorer or some other app, and set permissions to: rwxr-xr-x , reboot, done.

if possible, check firstly your x,y and z axis values from your magnetometer with an app called sensor kinetics by pointing the phone north according to any compass you may install from google play.

mine are:

x: +1,5

y: +28

z: +44

and the correct ones should be the same but with the z axis simetrical. "-44", not "+44"

also you could check on sensor kinetics app, magnetometer, click "demo" and check the red point directions before and after you install the fix.

If you could, please try it and let me know how it turns out to you.

regards
[Upgrading, Modifying and Unlocking] tommie.r:
Have you tried snappea?

I can use it to transfer files via usb cable.

http://m.snappea.com

http://youtu.be/Ji78IXvyQXo
[Upgrading, Modifying and Unlocking] coukou:
Thank you tommie, I'll give a try later.

I would like to understand why the heck after following the install (drivers, Root..) methods above I can't access my phone like everyone else in this thread?

Regards
[Upgrading, Modifying and Unlocking] tommie.r:
Well i thought using flashtool seemed a bit complicated compared with oneclick root so i have never used it. I messed around with flashtool a little in the beginning but i gave up. I installed adb drivers on my phone though. Snappea recognizes my phone at once when i connect via usb. So i can not help with understanding whats wrong.
[Upgrading, Modifying and Unlocking] coukou:
Sorry Tommie, I can't understand what you mean. May you reformulate?

Regards
[Upgrading, Modifying and Unlocking] tommie.r:
What i meant is, i have not used flash tool to root, i thought it was to complicated with all the drivers to install to get flashstool to function. Instead i found one click root, installed snappea om my pc just in case, so the one click root should function properly. I then used one click root and gained root access and then used mobileuncle tools to install cwm recovery img. I use snappea or an adapter to connect my sd dard directly to my pc when transferring files. Hope it clarifies things for you.;)

/Tommie.
[Upgrading, Modifying and Unlocking] coukou:
TNX for yr patience Tommie.

It's more clear now. So, the one click root is Snappea?

Anyway, may you be kind and let me know this step by step method?

Regards
[Upgrading, Modifying and Unlocking] tommie.r:
No the oneclick root is not snappea, snappea is a managing app for Android phones. Check out post #631 on page 62.

I couldn't post a link via phone...
[Upgrading, Modifying and Unlocking] coukou:
This thread has #626 posts for 16 page :confused:
[Upgrading, Modifying and Unlocking] tommie.r:
:o

Sorry, #613.

And here's the link...

http://colonelzap.blogspot.se/2014/02/how-to-root-zopo-zp998-mt6592-octa-core.html

I followed the instructions in the link and it worked for me.
[Upgrading, Modifying and Unlocking] Epsylon3:
interresting, the tool output some files in /data/misc/sensor/
[Upgrading, Modifying and Unlocking] casca:
? Sorry i don't think I understood...
[Upgrading, Modifying and Unlocking] Epsylon3:
when you run it as root, that create logs, but not on normal device start
[Upgrading, Modifying and Unlocking] khouryh:
GPS

thanks for the kind reply, this is a "good to know" i have to say that the A-GPS is SW related and that is good for the first lock, the antenna might not be the best on this device but i have compared it with nexus 4 that locks within seconds and never lose the signal, however the both lock to same 25-32dB, but for some reason (seems processor or SW, or over heating) the ZP998 loses the signal for few sec each 35min and then locks again..... any comments on this will add to my and others knowledge. thanks
[Upgrading, Modifying and Unlocking] Epsylon3:
When i compare to the Samsung Galaxy Note 2 with the app "Sensor list" i can see the BMM056 Orientation sensor is correct (with the original binary and the new one)

The badly configured sensor is the Gyroscope which is another chip/driver, the MPU305c, this mpu chip is linked to the other sensor chips.

the libray which use /dev/gyroscope is libhwm.so

source of kernel part look like this :

https://github.com/wiko-sources/cin...tom/common/kernel/gyroscope/mpu3000/mpu3000.c

https://github.com/varunchitre15/MT...e/master/mediatek/kernel/drivers/hwmon/hwmsen

with these sources, i can see i need to check this :

cat /sys/bus/platform/drivers/gyroscope/status

CUST: 2 1 (-1 0)

"1" is the chip direction, snprintf(buf+len, PAGE_SIZE-len, "CUST: %d %d (%d %d)\n", obj->hw->i2c_num, obj->hw->direction, obj->hw->power_id, obj->hw->power_vol);

I think it should be set to 5 or 6

which is the second line in this map of axis conversions:

Sensors Offsets seems to be tunable with /data/nvram/APCFG/APRDCL/HWMON_GYRO

root@S1:/ # hexdump /data/nvram/APCFG/APRDCL/HWMON_ACC

0000000 [0000 0000] [0000 0000] [0000 0000] 00aa

It 3x32bits signed ints for axis X Y Z.... but its not our sign problem

I guess this file is missing in zp998 source code :

https://github.com/TeamYogaBlade/le...x10_jb2/kernel/gyroscope/mpu3050c/cust_gyro.c

static struct gyro_hw cust_gyro_hw = {
.addr = 0xd0,
.i2c_num = 3,
.direction = 5,
.power_id = MT65XX_POWER_NONE, /*!< LDO is not used */
.power_vol= VOL_DEFAULT, /*!< LDO is not used */
.firlen = 16, /*!< don't enable low pass fileter */
// .power = cust_gyro_power,
};
[Upgrading, Modifying and Unlocking] lasslax:
Yes, to find the satellites gets help from the AGPS, that provides a list of satellites on a certain approximated position at a given time, so the phone does not have to search through all the existing satellites. When the GPS recognizes a satellite, identifies it, receives the positioning signal, then it is "locked". With better antenna or GPS chip the phone needs less time for the communication with the satellites for the recognition process.

Better antenna = faster lock. Even after a lost lock it is better to have a good signal to lock again, i.e. after a tunnel.

With more satellites used, the lower SNR signal can be sufficient for the positioning. The ZOPO has both low SNR AND less number of satellites.

I experimented quite a lot with this now, and found some blind spots in a 30 km radius there I live. And I lose the signal ALWAYS on those spots, independently from the time, I could not see any 35 minutes regularity.

And again: I did work quite a few years with radio waves, with antennas, with constructing and engineering of antennas, preamplifiers, receivers, radars and such stuff. Please do not take this to arrogance, but I know what I'm talking about.

If you follow the instructions to make a director preferably on the car holder, you'll be able to use your ZOPO for navigation.
[Upgrading, Modifying and Unlocking] casca:
I don't want too disagree, but in my case with the Thl t100s, when I compare the magnetic sensor values of the bm056d, with the corresponding sensor from my galaxy s3, the Z axis reading is incorrect. Also tested with my xperia P and the result is the same. So in resume, the gyroscope doesn't seem to be the problem unless the magnetic sensor uses it for some reason to point north.

What do you think?
[Upgrading, Modifying and Unlocking] khernitzz:
Audio Frequency Response

Audio Frequency Response of ZP998 on RMAA as reviewed by overclockers.ru

http://www.overclockers.ru/lab/58650_4/Karmannyj_Bulldozer_obzor_i_testirovanie_smartfona_Zopo_ZP998_na_baze_SoC_MediaTek_MT6592.html

You can see how how awful the sound of our phone is. I'm not sure wth Zopo thinks of ruining the response and doing a 10khz cutoff?