Cant Deploy To Real Android Device Xamarin

A quickly solution is by changing the package name in android manifest.

There have a Simple hack

1. if a Brand new application - then simply Change Android Package Name and Deploy from VS
2. if already play store publish one - then install app through play store and uninstall. then deploy from VS

this Works for me

There is no specific solution available for this problem , i think the reason is your phone OS doesn't completely uninstall your app, the app signature still lingers on(happens with heavily customized android, in my case its MIUI 8 ). I found out using logcat - signatures do not match the previously installed version

Potential Solution 1: Use Titanium Backup (Requires Root) to remove the app folder completely after uninstalling the app.

Potential Solution 2: Go to settings and remove the app from there , make sure to use the option uninstall for all users(in MIUI 8 this wasn't available)

Potential Solution 3: Use adb to uninstall your app completely its same as uninstall for all users.

adb uninstall yourpackagename

Incase you dont know it check in properties of your android solution.

Another way to find it how to delete an app from adb without knowing it's package name

adb root

Then enter adb shell

adb shell

Find out your apps package name:

pm list packages | grep "your app name/something related to your app name"

Then use:

adb uninstall

OR

pm uninstall

Potential Solution 4:(Not really a Solution) Change the app package name - wont conflict with the one you have already installed

Note:Doing a hard reset of your device should solve the issue obviously.

In my case 4th option worked, if anyone knows how to remove the previously installed app signature from android please let me know i will update the answer accordingly(probably requires an in-depth knowledge of the file system).