My Screen has often gives strange colours, freezes, and is unusable

When this happens (it happens every time i use it now. i need to lock and unlock screen and hop it works. the problem has been getting more frequent and now the device is almost unusable.
how do i find out if the warranty is still valid?

Hi and Welcome to the Community!
I recommend that you attempt to boot into Safe Mode:
KB17877 How to start a BlackBerry smartphone in Safe Mode
It may take you multiple attempts to get the ESC key sequence (press/release/hold) correct, so be patient. When successfully into Safe Mode, see what happens.
If the behavior ceases, then think carefully...what happened just before this behavior started? A new app? An update? A Theme? Something else? Think carefully as the smallest change could be causal...and attempt to undo whatever that was.
But if the behavior continues in Safe Mode, then you may need to consider more drastic actions -- WIPE, OS Reload, BBSAK Wipe/Reload, and the "Bare Bones" OS Reload Process. To prepare, you should be sure that you have a full backup to your PC...please review the Backup link in my auto-sig on this post for instructions.
Phil913 wrote:
how do i find out if the warranty is still valid?
By reviewing your original purchase documentation and/or contacting your original place of purchase. Warranty is a contractual matter between buyer and seller of the device, established at the time of original purchase...no one else is involved.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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