Step1. Download PDAtool APK from:

https://ccloud.ndevor.biz/s/KmrGjtXpNEyc3n7

Copy and Install it in the MT90

Step2. Dial *#3366# to enter PDAtool function.

Step3. Click Save picture and try to scan the barcode. The device will save the image automatically whether it scan the barcode or not.

Step4. The image saved as in the following route.

PS: If you just want to save the image that Successfully decoded, you need to enable the following selection.