how to remove border in textfield fieldset in material ui

I was looking for a borderless text-field and this is working for me…

<TextField
  variant="standard" // <== changed this
  margin="normal"
  required
  fullWidth
  id="phoneNumber"
  name="phoneNumber"
  autoComplete="phoneNumber"
  autoFocus
  onChange={handlePhoneNumberChange}
  placeholder="Phone Number"
  InputProps={{
    startAdornment: <AccountCircle />, // <== adjusted this
    disableUnderline: true, // <== added this
  }}
/>

These 2 props seem to be the key…

variant="standard"
 InputProps={{
        disableUnderline: true,
      }}