SIM tray won't go in all the way

You have three options one try rotating the tray to see if you are putting the sim tray in wrong. Second you file or sand down the tray to match then clean the tray. Finally you could return it and buy a different model for a different seller.

The SIM trays are incompatible between models. For instance, you can’t insert a SIM tray from a Galaxy S9 into a Galaxy S8, and vice versa. This solved my problem :)

There is a problem with the ejector button on these phones. Once it's pressed in too hard or incorrectly it will not spring back up like it should. I'm having the same issue with an S7 Edge. It's likely a faulty or weak design. Hence why putting a stiff item like a cut down credit card springs the ejector button temporarily into place. My advice since the stiffer material springs it. Is to not take the card out any more than needed after getting it sprung back into place. Eventually it won't spring back no matter what you do.

Hey everyone,

I was actually one of the original people to post a question about issues with the SIM tray not seating properly and whilst I did end up finding out why, I thought I would share my experience and include it with the mix of all the excellent responses that have already been posted. It was hard finding a lot of info online about it initially for some reason and what I experienced also needs to be considered.

I repair phones, computers etc and despite checking the inside of the SIM tray a dozen times, I could not find any reason why the sim tray would not slide into the SIM slot. Even with a decent magnifier I couldn’t see any obstructions and it wasn’t until I removed the metal sheath of the SIM reader which also holds the eject mechanism and sim to the motherboard, that I found the tiniest of shrapnel or what looked like small bits of a broken plastic SIM adaptor. Looks like someone has used a broken SIM tray or perhaps at one point, tried to put a SIM into it without using a tray, breaking it whilst taking it out. Unfortunately in my situation the pins that read the SIM were also damaged so I had to remove and replace the SIM reader entirely on the motherboard to get my problem fixed. (I was lucky I have some soldering skills but I would only recommend experienced repairers try this).

Removing the metal sheath can also be tricky and if not careful, you can damage the SIM reader as well.

Hope this helps

I had the same problem. Tried the credit card fix - no luck. I took it to a local mobile phone repair store and he looked into the slot using his microscope like thingy, and found a piece of something plastic, that was causing the problem. 10 minutes later he had managed to extract it and all was well. Thankfully, no damage to the slot - and both SIM card and SD work.