What is the effect of a personal attorney filing a personal brief in an appeal?

After defendant appealed, upon his request, this court appointed counsel to represent him. Upon examination of the record, counsel has filed a brief under the authority of People v. Wende (1979) 25 Cal.3d 436 and Anders v. California (1967) 386 U.S. 738, setting forth a statement of the case, a summary of the facts and potential arguable issues, and requesting this court conduct an independent review of the record.

We offered defendant an opportunity to file a personal supplemental brief, and he has not done so.