esp 01 firmware update

i wanted to update esp 01 firmware but i could not connect to it it gives me error again and again

We need more details to help you.

Which firmware?

How did you try to update it?

What do you mean by "i could not connect to it"?

What is the exact error?

pert: We need more details to help you.

Which firmware?

How did you try to update it?

What do you mean by "i could not connect to it"?

What is the exact error?

0.9.5.2 firmware i used the software Xtcom it was working first but now its not, it just show strange characters on serial monitor

it is not even responding to AT commands, i have even tried changing the baud rate but no luck

i just bought new esp 01(black one). it was working fine on first day but now it is not working, when i open the serial monitor it just gives me strange characters. so i decided to reflash the chip but i couldnt do it either. i am using the software xtcom to upload firmware but when i try to connect it it gives me the error of failed to connect with target

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