[OnePlus 8 Pro  Guides, News, & Discussion] FatherJony:
My story begins with what was admittedly my own mistake. I wanted to order an Oneplus 8 pro for me and a Oneplus 8 for my sister, but her preferred color was only in stock at Bangood at the moment of the order around the beginning of May. My recollection at the time was that back when i got my Oneplus 7 Pro, around two years ago, Oneplus EU (i live in the EU) did offer warranty services to international devices, so stupidly, instead of checking what the current status is, i went ahead and ordered both phones from Banggood.

As Merphy's law dictates, my unit came with red tinting as well as intense clouding on the bottom half of the screen. I had assumed that Oneplus would have solved the display issues by now but once again i was wrong. Here is the red tint:

And here is the clouding:

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So i contacted Oneplus support and i described my issue, not neglecting to mention that the device was Chinese. The employee was reassuring, telling me that it's covered by warranty and as long as the motherboard isn't damaged, the service center will replace the defective part at no additional cost. I proceeded to open a ticket and sent my Oneplus 8 Pro to the Oneplus service center for repair. Soon after, i received an unexpected email, asking me to wire 290 euros for the repair to proceed. I contacted support again and they told me that the previous employee was in error, and that the warranty policy of Oneplus had changed and did not cover Chinese devices anymore. I was not at all happy to hear this, but a simple visit to the Oneplus warranty page confirmed that this was indeed the case. So i asked my device to be sent back in order to think on my options.

The manufacturer's service center had verified that the display was defective and the phone was less than a month old. So i could pursue a full refund either via Paypal, or directly though Bangood. As this is a fairly lengthy and bureaucratic process, i thought that i might pursue an alternative via Oneplus. I would pay for the repair, as long as the new part was under warranty since Oneplus 8 screens seem to have a very high defect ration. Oneplus confirmed that this is the case not once, but twice, so i decided to trust them.

Big mistake. While the replacement screen was free of clouding and tinting, it had this dark bar that could only be seen in very low brightness:

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Since i often use my phone in total darkness, that was a deal breaker for me, so i contacted support again to request for another repair. My phone reached the service center, but the days were passing by without a single notice from them. I contacted support to inquire about the status of the repair and they informed me that i would soon receive an email with a quote for the repair. I promptly explained that the display had just been replaced, thus was under warranty, providing a screenshot of the assurances i had received concerning this, along with the number of the previous repair ticket.

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To make a long story a little shorter, Oneplus now claims that my motherboard is also defective and i need to pay them around 390 more euros (the cost of the motherboard including VAT) in order to get a replacement. So, they are effectively asking me to pay a total sum of 680 euros, approximately the cost of a new device in order to replace a phone that was either:

a) Shipped with a defective display and a defective motherboard, meaning that Oneplus quality controls lets them sell expensive paperweights. It also means that their service center failed to notice the motherboard issue the first two times it examined the phone. I guess 3 times is the charm.

b) Damaged during the screen replacement. The Oneplus service center was the only one that had access to the insides of the phone.

c) Or most probably, the phone is totally fine, expect for the replacement display that is clearly defective, but Oneplus is unwilling to honor its warranty and is seeking ways to charge me for the replacement. Interestingly, Oneplus claims that both the display and the motherboard need to be replaced.

Now logic dictates, that the culprit must be either the signal (motherboard) or the display, but not both. But since i cannot disprove the veracity of Oneplus' claims i decided to ask for the replacement of the screen alone, since it is supposedly covered under warranty, but Oneplus refused, stating that they can't do partial repairs, which is a ridiculous claim. So i guess if you guys have cracked screens or any other issue with your phones, do not send them to Oneplus for battery replacement unless you want to be blackmailed to paying for replacement parts for everything that isn't in pristine condition.

In conclusion, trusting Oneplus costed me the ability to be able to claim a full refund, which i no longer can do since the device has been repaired. My phone has spent more time on a Oneplus bench than in my possession and it still has a defective display despite me paying for it to be fixed. Ironically, i've also wasted countless hours in mostly worthless debates with Oneplus support. This is without a doubt the worst experience i've ever had with a corporation's after sales support in my life and i aint young anymore. I do not care so much about the monetary aspect of this, but the opportunism and dismissiveness OnePlus shows towards its own clients is infuriating. I did not want to litter this thread with more screenshots, but the email correspondence between me and Oneplus support is quite telling.