@z_i_r_o wrote:
I bought a brand new mobile phone (Xiaomi Redmi Note S9) about 3 months ago. The phone worked really well, but suddenly it broke (stop charging, can't switch on anymore).
The mobile phone itself looks still brand new, not a single scratch, I had barely used it and sure enough, I haven't dropped or anything. In my opinion, it is clear that the warranty should cover, but the seller stops replying and also took all his items from eBay (it seems he is not selling anymore... even being a pro seller since 2016).
How can I get support here? this frankly looks like a scam: selling low-quality technology and then disappearing when things get ugly. I wouldn't complain if buying from a random guy, but this seller has 4 years on eBay and 98,7% votes... what am I missing?
OK, this is a long shot, but here goes anyway. Even if this isn't the issue with your phone, it could help other people that have charging issues. Is the connection port on the phone a USB-C connection? They are an oval shape connector, rather than the standard universal connector. If it's a USB-C, grab a torch and have a look in the connection socket. Is it clean?
A lot of people have issues with USB-C phones not charging after awhile, or have difficulties doing so. The charger will plug in, but if you move it even a mm, it stops charging. Grab a fine wooden or plastic toothpick (nothing metal) and run it around the outer part of inside the port. See if it lifts any fluff out. The issue that people have is that keeping phones in their pocket, or bag, little bits of fluff build up and build up, until it gets to the point the charger can't make contact to charge. It can happen within a few weeks, it could take a year, depending on your phone and how you carry it. Each time the charger is plugged in, the bits of fluff get more and more compressed. Then next time the charger is plugged in, new bits of fluff get compressed in there.
If you plug the charger in, does it give a bit of a click when you put it in? If you plug it in, can you pick the phone up by the charging cable without the phone falling off? If you answer no to either of those, then there's a good chance you have charging port fluff.
Mr Tippy's phone is only 2 years old. A Samsung with a USB-C charging port. For probably the last 18 months he's complained about charging issues. Recently, it got to the point where it was nigh on impossible to charge. In fact, it was impossible. We were all set to go and buy a new phone. Instead, I did a google search (for why is USB-C so bad) and found this fluff issue. I am not joking, from that small charging port, I cleaned out enough compressed fluff to cover a 10c piece. Now, the charger "clicks" in and the phone can be picked up by the cable and not fall off. Most importantly, it charges!
I can send you a link to the YouTube video I found about charger fluff if you're not sure what I'm on about.
Certainly worth looking at to see if that's the issue. If not, as someone else said, file a bank chargeback on your credit card.
