Normally when I’m having issues with a router the first thing I’ll do is perform a hard reset of the router. This can be accomplished by making sure the router is connect to power and is on then inserting the end of a paper clip into the reset hole and holding the reset button down for 20-30 seconds. Once the router has been reset, you will have to reconfigure it. Make sure that during the reconfiguration process you update it’s firmware to the latest version. Hope this helps!

If you are having issues with your SIM card I would suggest that you contact them for assistance. They will be able to issue you a replacement SIM card if necessary. Doing a hard reset of your phone (after backing up all your date of course) might be the solution to your camera issue.

Put it in this

You can't just hook up the battery to a USB cable to charge it that way. I would suggest that you get your hands on a new battery and see if replacing it solves your problem.

You're going to have to open up the Joy Con and visually inspect it. Clean any dust and debris out if necessary. Check to see if the joy stick or buttons seem to be damaged and replace the damaged components if necessary.

The only setting that could affect the mic would be the mute button in whatever phone app you are using. You could try using Bluetooh earbuds and if you don't have any problem with your mic while using those then yes the jack is the likely culprit. Check the jack to make sure there's no buildup of lint or dust which could be impeding the jack from making a connection with the mic line. If it looks clean then a jack replacement might be in order. Personally I would do a soft reset first and if that doesn't work do a hard reset (after backing up your data first of course) to see if that fixes the issue.

You will have to enter the iCloud login information for the account that the iPhone is associated with. If your friend can't remember their iCloud login information they can recover it here: https://iforgot.apple.com/

It would be good if you could post some more information about what is going on with your DS. For example when you try to turn it on do any of the LEDs such as the power light turn on? Does the charging LED turn on when it's plugged in? Are you running some custom software on your DS? Do the screens remain completely black or do they If you plug your DS on and none of the LED lights turn on that could mean that your charger is bad and you need to try charging it with a different charger. If your charger isn't the issue and the lights still don't turn on with a good charger plugged in that could mean that you need a new battery.

It would appear that to replace the battery on your model laptop you don't need to open the laptop or unscrew anything. There should be a switch or a couple of buttons to release the battery so you can remove it and then just replace it with a new one.

It depends on what parts of it need to be cleaned specifically. Screens can be cleaned with microfiber cloths and then buttons and charging ports can be cleaned with QTips.