A new popup will appear on your screen. Now there will be two options. First, Upload a picture and second remove the picture. Also, there will be a box to change your name on Microsoft teams.

You can change your name and Upload a picture of your choice from the same popup.
Change Team Profile in Microsoft Teams using a mobile phone
To change your profile picture and name on Android, firstly, you need to download the Android app of Microsoft teams.
After downloading the app, log in to the app. On the main screen of Microsoft teams, you’ll see a three-bar icon. Click on that icon, and a menu will appear from the side.

On that side menu, you have to click on your default name, and you’ll see the next screen. The next screen will have options to change the name and profile picture. Also, you can go to app settings and click on the profile option. It will do the same and open profile screen.

Now secondly, you need to click on the “edit image” to choose your profile picture. You will see a pencil icon on the top side click on that to change your user name on Microsoft teams.
How to change Team name and Picture in Microsoft Teams
Similarly, we are going to see the Process of changing team pictures in PC and Mobile.
change Team Name in Microsoft Teams in PC
To change the team name log in to the Microsoft teams app. Firstly you have to click on Teams options on the left sidebar of the app. secondly, you have to click on the Edit team.

Once you choose the edit team, it will open a pop-up.

Now lastly, you have to enter your desirable team name on that popup and save it by clicking on done option.
change Team Picture in Microsoft Teams in PC
Firstly you have to log in to do the process. Secondly, click on the team’s option, which will be on the left bar. Now you will see a list of all the available teams.
After this, you will see your default team picture set by Microsoft teams app. click on that, and you can change it. This is a quick way to do it, but if it doesn’t work, then follow other steps provided after this.
Click on three dots on the side of the team name of your choice. Now click on management teams.

On the new screen, you will see different options. Choose the setting option on that screen and click on the team picture option.

After clicking the team picture option, you’ll be able to see the change picture option.

Sometimes you’ll get an error saying, “We’re still setting up your team, you can change your picture when we’re done.’ Don’t worry, it is a temporary error, and it’ll go away after some time. If it doesn’t go away, try with another PC or Mobile Phone.
Change Team Name & Picture in Microsoft Teams in Mobile devices
Firstly you need to launch the app. After launching the app, you will see Teams option in the menu located at the bottom of the app interface. Click on it.

It will provide a list of all the available teams. Click on three dots on the side of the team name, which you want to modify. After this, you will see a menu with the Edit team option. Click on that option.

On the next screen, you will see different options like change team name, add team description, change team picture, etc. Choose your option and proceed with it. After the Modification of any options, you have to click on the checkmark icon to save changes.
Conclusion
You can change your profile picture or your name using the mentioned process whenever you want, but if you want to change your team name of Microsoft Team picture, you need to be a team owner. If you are only a member, you cannot change or modify the settings of teams. If you get an error in uploading a profile picture or team picture, try changing the resolution and size of the picture. You can also try using different devices.