my A30s has been modified in an unauthorized way

[Android Central Question]

i try to update my A30s and says that my phone operating system has been modified in an unauthorized way. Try to updating using Smart switch on your computer or visit a service center

 

[mustang7757]

Can you get in recovery or download mode?

I'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply

https://forums.androidcentral.com/showthread.php?t=409154

 

[B. Diddy]

Welcome to Android Central! Did you ever root the phone? Or did you get this phone from someone else (or was it used/refurbished)?