For many users of parallel mobile phones and operators, in order to use different mobile phone cards and 4G, network mode and 4G cracking are all problems that need to be solved by themselves. This is the beginning of many people taking the Android toss.
This science, mixed with the tutorial, is the right to give the humanity care to the friends who have just entered the pit. The opportunity to write this is that the author entered a Verzion version of the S6 edge...
According to the different blocking methods established by operators, the method of cracking is also very strange and difficult. It is roughly divided into four categories: system, build file, Qualcomm debugging tool and engineering mode.
The system itself
The network soft masking method of some systems is very simple, just hiding the switch page. But Android's acTIvity mechanism (which can be used as a page, all interfaces are composed of many acTIvity), allows third-party applications to dig out the system's intentionally hidden interface.
More shortcut, and its hidden shortcuts
In applications such as "more shortcut, nova desktop" that can view system shortcuts/acTIvity pages, you can find a lot of scattered settings, and it is likely to include a lot of content that should not appear on some models.
Hidden LTE switch, GSM/UMTS band, roaming network settings page
For example, the V version of the S6 edge can call up an LTE switch. Although this switch can't be clicked, it is definitely not something that the V-version will add. It should be an element that has not been cleaned up in other versions of the system.
The set switch can control the GSM/UMTS frequency band, roaming network settings, and there is also a shortcut to enable 4G, but it, flash, retreat,...
Build.prop file
RE manager and G925V build.prop file
Many people toss the beginning of Android, are the RE manager and build.prop file. Although this file has only 1 to 200 lines, changing the above parameter values ​​makes it easy to change the machine model, language information, system DPI, network settings, system virtual memory and many other parameters.
Some unusual simple crack exceptions are made through it, such as Samsung S4 LTE-A (SHV-E330), after root, the model in system/build.prop is modified from SHV-E330 to SM-N9005 (this is One of the Note 3 versions), you can open support for FDD-LTE B1/3/5/7 in one go.
Left is the modified network selection interface before modification.
In addition, for the V version of S6 edge, after modifying system/csc/sales_code.dat to CHN, or changing the model and area name in build.prop to chn, the network mode selection menu and notification bar will appear different. Variety. The Hong Kong version and the US version of the system interface are interchanged after modifying a few letters. Do you understand why Samsung's ROM is particularly large? Because they actually stuffed the contents of N versions...
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