Back Compatibility of Bluetooth Versions - keyboard

I am buying a phone that runs Android 9 Pie (Go edition) and has Bluetooth 4.2. I want to use a folding wireless keyboard with it. Will a keyboard that uses an earlier version of Bluetooth be compatible?

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Android Studio 3.5.3 debugging on Sony Xperia XA2 Ultra

My Android Studio does not recognize my Xperia XA2 Ultra phone for debugging my app.
I checked that Google USB Driver was installed in the SDK tools of Android Studio.
I tried connecting my phone to my laptop in USB 2.0 and USB 3.0.
But my phone is connected in MTP mode and I can't find any option on the phone to change it to MSC mode.
I had the same problem with Sony Xperia XA2 Dual. Finally I found the solution: switch USB preferences to "No data transfer" or "USB tethering" mode.
One sad thing is that you won't be able to simultaneously transfer files and debugging apps (but you have the Device Explorer working as usual).

Android studio not detecting my phone even usb driver installed in studio

I am not able to detect my phone in the android studio.
My system is detecting my phone but it is not showing on android studio only.
I have installed USB driver on my system and also turned on the developer option on my phone.
I am using Lenovo A7000-a model phone and windows 7 operating system.
Can anyone help me out??
You should have to open phone into developer mode.
steps for developer mode:
1. go to setting
2. go to about phone
3.click on phone version at 7 time then you will get developer mode on.
After this process you should have to use phone in testing for android studio.
And install the device driver in you system also.

Add bluetooth mouse to Windows 10 after removing

I accidentally removed my Microsoft Bluetooth Mouse from the Windows 10 Bluetooth settings. Now it doesn't appear at all in Manage Bluetooth Devices. How to get it back?

android studio not found device

My device is ASUS K00z.
I connect it's to my PC for develop android app but in android studio not found device.
I set debugging mode to on.
In device manager show yellow exclamation of "Android" under "Other devices" root.
How to solve it's
PS. I use win7 64-bit
Try downloading the drivers from ASUS. I didn't find any 'k00z' on there, but it sounds like it may be the Fonepad 7 - they'll likely have different model numbers, so you'll need to know the specifics of your device and download the appropriate driver.

adb not recognizing one of my pairs of Google Glass

I had two pairs of Google glasses. One is black(original version) and the other white(new version). I had done a lot of development using the black pair. We sent the black one back to exchange for the new version. I tried to continue developing using the white pair but can not get adb to recognize it.
OS: Mac 10.8.5
Eclipse 4.2.1
Glass Firmware: XE16.11
ADT Package 2.3
Android SDK Tools 22.6.2
Android SDK Platform-tools 19.0.1
Both pairs were set to debug mode.
Thanks,
Mark

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