Fix Mobile network/IMEI Change/ Mobile network not available /No signal on any android /datawind tab

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Here I fixed Not Registered On Network in Android phones, mostly error occur in any mobile phones.
DATAWIND TAB/ sumsung
If it says it has and invalid Imei please watch this video first before proceeding this.
Hey guys and in the last video a flashed a stock firmware of this device because it got stuck on the logo and i finally fixed it. But when i try to call someone it says Mobile network not available and in the signal bar it is always searching. I look for a fix of this device and luckily i found it. At first it has an invalid imei but i already know how to fix it .

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Please watch: “M.Laskar”

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Source: Youtube