I damaged the android configuration file - Android Q&A, Help & Troubleshooting

Hi ,
I was trying to install certain application, but I couldn't because of my android version, so then I rooted my device and I edited configuration file (system/build.prop) with system variables such as API version, android version, name of device etc. First I changed only my android version from 4.3 to 5.1 and I rebooted my tablet and my system was fine, but my application still doesn't open. Then I thought that API version could cause the program to start, so I changed it from 18 to 24, I rebooted tablet and every Google Service was crashing with message "Unfortunately, Google XXX services has stopped"
I was trying to open configuration file again, but it's impossible, because of error messages.
I did force restore android system, but it doesn't restore system configuration files
And I installed app with gives access for editing system files again (i got apk file by usb), but I can't open it.
My tablet: Huawei Mediapad t1 8.0
Thank you for help

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I'll PM them if you need to see them
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Kind regards

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Dears,
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This library is an open source project well known as RootBeer and i'm a little worried about my Bank is using an opensource project (without any mod) to ensure my safety and security :angel:
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Thank you very much for your answer.
FransisFor.
Hack signature
You can hack signature first,after you can lib check exchange if you can send hacked files me,please

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