[MTCD  Android Head Units Q&A] zerozoneice:
Here is the changelog to apparently all FW updates of 7.x so far:

(from [MENTION=8406911]S@lman1996[/MENTION]'s link, translated from chinese).

2017-04-13

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**- new text strong two-in-one Bluetooth module;

2017-04-12

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**- update mobile phone interconnection

2017-03-31

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**- update 968 Bluetooth sdk;

**

2017-03-30

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**- increase 968 Bluetooth, BC6 Bluetooth;

2017-04-6

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**- Remove the carousel from beginning and stop recording of the tone

**- HDMI sound BUG

**- Add a new power switch to the ACC configuration

2017-04-8

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**- Repair USB camera hot swap problem

2017-04-17

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**- Added dual-screen explicit support. By default, double-click the mode key to switch mode

**- repair USB camera, Huaping, splash screen problem

**- Added rmvb video decoding support

**- to repair IGO start time to spend the problem

**- update the file manager, video player, driving recorder part of the code

**- update Canbus code, to adapt to multi-user switching problems, compatible with the following version of 7.1 Andrews

**- boot automatically unlock the screen to prevent the VPN settings lock the next boot can not use the problem

**- update 968 Bluetooth sdk;

2017-04-17

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**- Added HCT2 public version of the UI

**- Clear the upgrade support automatically install the upgrade card apk

2017-04-19

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**- update mobile phone interconnection

**- support md725 two-in-one Bluetooth

2017-04-20

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***- increase ION to 250M, to avoid some video and driving recorder work together BUFFER not enough problems

***- add the reset before the USB and TF card reset strategy to prevent the above state after the opening of the wrong, resulting in the probability of not reading USB problem

2017-04-21

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***- Increase the Bluetooth OBD function

***- Update the style of the DVD screen progress bar

2017-04-22

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***- update our media audio application with third party application mixing issues

2017-04-24

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***- Update Google Maps splash screen problem

2017-04-25

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***- update the recovery version V7.1.1, and the upgrade-related Settins and HCTUpdata applications

***-Radio Band bug

*2017-05-02

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**- Fixed a bug where some files in the external storage device have read and write permissions can cause the music / video application to not search for a file

2017-05-03

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**- Automatically judge 1G and 2G DDR take different optimization modes

**- update GUP lib

2017-05-03

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**- mode switch bug

**- upgrade the first start to join the initialization display

**- control learning to join the google voice button

2017-05-08

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**- increase the text strong BC5 Bluetooth;

2017-05-09

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**- modify the text of the strong MD725 Bluetooth: Meizu mobile phone to solve the time to cut the voice of the past is not the problem; optimize the call when the other hang up, hang the problem.

2017-05-09

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**- update sdsdk968, modify the reported Bluetooth type, call the sound reduced by a grid;

2017-05-10

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**- update gocsdk5

**- Update the phone interconnection EasyConnected.HT05.4.3.7-170510

2017-05-11

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**- Fixed "GPS set in place, the weather interface to switch the server list when the interface card Dayton" problem

2017-05-12

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**- update sdsdk968, optimize the connection to Bluetooth when Cardon's problem;

2017-05-15

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***- update the phone interconnection EasyConnected.HT05.4.3.7-170512

***- public version of Launcher2mtc2 increase wallpaper;

***- Optimize card reader

2017-05-16

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***- Modify settings to display the audio screen timeout

***- update mobile Internet EasyConnected.HT05.4.3.7-170518:

2017-05-20

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**- touch learning plus music keys

2017-05-22

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**- time setting 12 hours memory

*- Adjusted dual-screen off, 1G version is turned off by default

2017-05-23

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**- Modify the HCTBlueToothManager

**- increase HCTVoice control parrot Bluetooth voice;

2017-05-24

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**- Updated video library, the original part does not support

**- Update boot animation

2017-05-26

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**- modify 968 Bluetooth sdk, processing connected to Bluetooth after the search is not open;

**- update the gallery

2017-05-27

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**- off Acc no memory error problem

2017-06-02

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**- fix "first open 3g / 4g network, and then open the wifi network can not access the Internet" problem

**- canbus

2017-06-03

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**- Update Bluetooth optimization client operation A2DP operating speed faster disconnect A2DP problem! The

**- hdmi

2017-06-08

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**- Fixed "MF833V module will not reconnect after the network" problem

**- Fixed "first mobile Internet, and then connected to wifi after multiple ip route, resulting in wifi can not access" problem

2017-06-09

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**- update gocsdk8, select BC8 to run this sdk, actually hard for BC6 module;

2017-06-15

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**- update gocsdk6

2017-06-16

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**- update sdsdk, increase the call sound;

2017-06-17

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**- update sdsdk8, deal with Apple phone calls when the speaker did not sound out;

**

2017-06-19

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**- Fixed "switch ACC wifi network, ping delay, the impact of billion even" problem

**- update mobile Internet EasyConnected.HT05.4.3.8-170619 version;

2017-06-20

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**- modify sdsdk968;

**- Fixed "plug 3G / 4G card signal, the non-main interface applications will be killed by the system" problem

**- modify the text strong bc6 Bluetooth sdk, processing engineering options to choose BC6 and BC8, resulting in Bluetooth no sound output problem.

2017-06-21

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**- update fuse, limit the installation copy of the memory space, to prevent the memory is full, the next cold boot no space to load the file led to the machine card logo do not come

**- update gocsdk6, 1. modify obd sometimes not connected to the problem.

******************2. Added support for downloading SIM cards.

******************3. Increase the MIC gain, the other answer the sound is not a very small problem!

******************4. modify the phone has the probability of variable OBD icon!

******************5. increase the name of the download phone name and the name of the problem!

2017-06-21

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**- update gocsdk8, modify the customer made the OBD bad connection problem.

2017-06-23

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**- update gocsdk8, optimize some of the phone A2DP connection is not on the issue, optimize the Bluetooth play some time can not play the problem.

**

2017-06-29

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**- correction "in the drive recording interface video, insert the USB card network when the car can not continue to record automatically" problem

2017-06-29

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**- update the Bluetooth sdk: gocsdk8, sdsdk, sdsdk968;

2017-07-03

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**- update BC6 Bluetooth soft consumer:

***********1. modify the ACC disconnect OBD, Bluetooth bad connection problems.

***********2. Optimize the sound quality of the call.

***********3. modify the call, the man cut the phone, not cut into the car machine! There is no man to operate the default sound on the machine.