Galaxy s7 edge sim tray missing!

I recently bought a Galaxy s7 edge (used) and it seems to not have the SIM tray, or the cover might be broken. Can I purchase a SIM tray anywhere, or is that not possible? Any suggestions?

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how to connect pc internet to android mobile via wifi?

i have galaxy a5 2016
how to connect pc internet to android mobile via wifi?

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Updating my Redmi Note 3

Hi. This is my first android phone. I bought a Redmi note 3 about a month ago and I installed miui8 V6.8.18 dev beta version. Now that the global stable ROM has released I have no idea how to install the ROM in my mobile. I wanna switch back from dev version to the global stable version. I downloaded the global stable ROM file but when I try to install it, the updater app says "Can't verify update package". I downloaded the file from the mi website oly but still i get this message. And I have no idea what to do and how to do so please help me with this. Thank you!

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Annoying Popup messages

Hi All!!

Every five minutes i get a pop up message in my android phone saying:
"Whatsapp trying to read Contacts", and below the deny and allow buttons with a timeout counter. (also a tick box to remember the choice)

other times I get "Airdroid trying to read SMS" with the same options...

How do i get rid of those annoying windows?
and/or how can i make it remember my choice? It doesnt work when i tick the box...

thanks in advance,
Rui

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How do you fix soft keys that suddenly stop working?

My back and recent keys on my Samsung Galaxy J7 stopped working abruptly for no reason.

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"Always on display" note 7

Just got this phone today. Everything waa fine. Now the always on display sits on the edge and not the center of a the screen. How do i fix this?

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Apex Phone Icon does not change

I have Note 7
In Apex launcher after i apply theme all Icons changes but Phone Icon does not change
can someone Help plz

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