They refuse to repair my Note 4 under warranty

Your phone should have been returned to you in the same condition pre repair. Did you take it to a local shop? Microphone and speaker issues can sometimes be software issues, a factory reset may resolve it. Otherwise, take it back to the shop or whomever preformed the repair and have them check the microphone on the charging port with the back cover off or replace it.

Good luck

Holger

You say, they refuse to repair a phone, they broke themselves.

Was it a Samsung authorized shop, or Samsung themselves? If it was the latter, then they are responsible for it. In the uk I would contact trading standards and see what they say, but i am not sure what country you are in.

I have buy a used Samsung Galaxy Note 4 I think is one of those Sprint spy selling off Sprint phones that they cannot sell. Sprint Tripped the Knock Security warrenty void Ext (2) Samsung refuse to repair it.

I simply use it with out a contract and use it as a tablet when it dose break down and dose not turn on when ever it is in the future. I will simply trash it

I got you two options

Option 1

as far as your problem. Trash it. All the known brand name that selling phones will not repair. So that customers can waste money. then the customers cannot continue to run there 2 year contract with what ever cellular phone carrier I.E Sprint , and so on and so forth. and charge thousands of dollars . if you want to buy Apple. and have Apple repair it. They do not repair. they simply call the police for customers that refuse to buy new iPhone. Disgusting. trash it buy a flip phone. No data plan. and the Celluar phone not to use Texting. No repair allowed

if you want a 2nd option is look up cell phone repair and have them replace the motherboard.

However its going to cost more then buying a new phone

you can buy a new phone or send the stupid thing back to Samsung in South Korea. with the screen smashed the motherboard smashed to bits. with a disgusting F*CK you letter to Samsung to protect America

Korea ripping off America. Time for America to fight back and say F*CK no More We are not going to take it no more

call Dr. Celluart to replace your motherboard

or

smash the stupid thing to bits and send it to Samsung South Korea with a disgusting F*CK you letter to MAKE AMERICA GREAT AGAIN! Samsung South Korea is ripping off America sell America this crap! sent the stupid thing to there SAMSUNG IN SOUTH KOREA CEO! DO NOT WASTE YOUR MONEY REPAIR IT AND BUY NEW SAMSUNG ANYTHTING! THEY GOT TO ME JUST AS MUCH THEY GOT TO YOU!