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I've been asked if I can check some faulty behavior of a device, a cheap Chinese android smartphone.

I'm not really an android expert, usually I install a few apps to help me figure out few things about the device. These apps I've reported conflicting results compared to what was displayed in the main android settings area:

• With DiskUsage internal memory is reported as 3.9gb vs 16gb in system settings.
• Device Info HW (suggested by @alecxs) explicitly mark as fake the reported version 9.0, pointing Android 6 as correct with API level 23. Unfortunately the app reports the same storage size of 16gb as stated in system settings. In my previous attempt I've CPU Info.

This kinda reminds me of fake USB thumb drives scams with less memory than advertised.

So is there a way (preferably without root) to test/analyze common technical details of a device for possible tampering/spoofing?

Like

• Storage
• Android version
• RAM
• CPU
• Something else that can be faked?

FLOSS solutions are highly appreciated! :)

UPDATE

Listed used apps and updated after suggestions in comments.

I've been asked if I can check some faulty behavior of a device, a cheap Chinese android smartphone.

I'm not really an android expert, usually I install a few apps to help me figure out few things about the device. These apps I've reported conflicting results compared to what was displayed in the main android settings area:

• With DiskUsage internal memory is reported as 3.9gb vs 16gb in system settings.
• Device Info HW (suggested by @alecxs) explicitly mark as fake the reported version 9.0, pointing Android 6 as correct with API level 23. Unfortunately the app reports the same storage size of 16gb as stated in system settings.
  Following another intuition of @alecxs, inspecting the partitions tab and looking at the displayed partitions sizes, it's possible to detect yet another forged spec. The total reported partitions size is around 8gb, the userdata partition is around 4gb which is corresponding to DiskUsage report. In my previous attempt I've CPU Info.

This kinda reminds me of fake USB thumb drives scams with less memory than advertised.

So is there a way (preferably without root) to test/analyze common technical details of a device for possible tampering/spoofing?

Like

• Storage
• Android version
• RAM
• CPU
• Something else that can be faked?

FLOSS solutions are highly appreciated! :)

UPDATES

• Listed used apps and updated after suggestions in comments.
• Added considerations and further analysis of partitions memory size.

I've been asked if I can check some faulty behavior of a device, a cheap Chinese android smartphone.

I'm not really an android expert, usually I install a few apps to help me figure out few things about the device. These apps I've reported conflicting results compared to what was displayed in the main android settings area:

• With DiskUsage internal memory is reported as 3.9gb vs 16gb in system settings.
• Device Info HW (suggested by @alecxs) explicitly mark as fake the reported version 9.0, pointing Android 6 as correct with API level 23. Unfortunately the app reports the same storage size of 16gb as stated in system settings. In my previous attempt I've CPU Info.

This kinda reminds me of fake USB thumb drives scams with less memory than advertised.

So is there a way (preferably without root) to test/analyze common technical details of a device?

Like

• Storage
• Android version
• RAM
• CPU
• Something else that can be spoofed?

FLOSS solutions are highly appreciated! :)

UPDATE

Listed used apps and updated after suggestions in comments.

I've been asked if I can check some faulty behavior of a device, a cheap Chinese android smartphone.

I'm not really an android expert, usually I install a few apps to help me figure out few things about the device. These apps I've reported conflicting results compared to what was displayed in the main android settings area:

• With DiskUsage internal memory is reported as 3.9gb vs 16gb in system settings.
• Device Info HW (suggested by @alecxs) explicitly mark as fake the reported version 9.0, pointing Android 6 as correct with API level 23. Unfortunately the app reports the same storage size of 16gb as stated in system settings. In my previous attempt I've CPU Info.

This kinda reminds me of fake USB thumb drives scams with less memory than advertised.

So is there a way (preferably without root) to test/analyze common technical details of a device for possible tampering/spoofing?

Like

• Storage
• Android version
• RAM
• CPU
• Something else that can be faked?

FLOSS solutions are highly appreciated! :)

UPDATE

Listed used apps and updated after suggestions in comments.