Can data on a phone be extracted?

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Recently I dropped my xperia z5 phone and the back cover shattered. I ordered a new cover costing £5. I checked on YouTube explaining how to replace the cover. It seems fairly straightforward; with no component need addressing. The cover was removed and a new one stuck on in minutes.
I went to a shop to ask if they could replace the cover for me. I was told it would take over 40 minutes. I was skeptical about this and feel concerned about the security of the data on my phone. The internal storage has picures, passport details, bank details etc.
If I remove my sim card and memory card and power off the phone, will the phone engineer still be able to extract this information even if my phone is password protected?
 
Yes,what ever remains on internal storage anyway, if he has the correct software!

There is a program an acquaintance of mine uses for data recovery on damaged mobile phones, for example the screen on my old phone became unresponsive, I couldn't so much as enter my password let alone answer calls etc. He ran the program, I think it was called Dr Fone but was able to recover all my pictures etc without need of my password or anything.
 
It's running android which has built in, optional encryption. This would prevent any form of data recovery like that, at the cost of performance as your phone will have to decrypt anything that it wants to access.
 
It's running android which has built in, optional encryption. This would prevent any form of data recovery like that, at the cost of performance as your phone will have to decrypt anything that it wants to access.

Stopped being an option and became the default a long time ago.

No extracting anything without the pin.
 
Stopped being an option and became the default a long time ago.

No extracting anything without the pin.
So any data you put on a phone internal storage would get encrypted but anything you put on the microSD card would not ?

Example
If someone stole my mobile phone they would only be able to copy/use/see the data that on the SD card but would not be able to use or see my data on the internal storage with out the pin/password ?


If that is the case I never knew that..
 
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The SD card isn't encrypted by default, that is correct. The internal drive is encrypted.

I tried to find away around this once because the firmware on my phone was borked by an update requiring a complete firware reinstall. Couldn't access any files.
 
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