OPINION

Carlos Lopez-Rosado pleaded guilty to one count of distribution and possession with intent to distribute cocaine hydrochloride and marijuana, in violation of 21 U.S.C. § 841(a)(1). At sentencing on December 20, 2004, the District Court determined that Lopez-Rosado had an offense level of 33 and a criminal history category of I, which resulted in a Sentencing Guideline range of 135 to 168 months. 1 The District Court imposed a sentence of 148 months of imprisonment, three years of supervised release, and $2,100, which included a fine of $1,000, community restitution of $1,000, and a special assessment of $100.

Lopez-Rosado filed a timely appeal challenging only his sentence, arguing that the District Court: (1) treated the Guidelines as mandatory in violation of United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005); 2 (2) violated his Sixth Amendment, right to trial by jury by engaging in judicial factfinding; (3) erred in finding that the quantity of cocaine hydrochloride involved was at least fifteen but less than fifty kilograms; and (4) erred in enhancing his sentence for leadership role because he did not have an opportunity to object to the enhancement. Because Lopez-Rosado’s first argument requires that his sentence be vacated and remanded, we address that argument alone.

We have established a general policy to vacate and remand all sentences for “defendants sentenced under the previously mandatory regime whose sentences are being challenged on direct appeal.” United States v. Davis, 407 F.3d 162, 165 (3d Cir. 2005) (en banc). As we reasoned in Davis, we are unable to “ascertain whether the District Court would have imposed a greater or lesser sentence under an advisory framework.” Id. at 164-65. It is undisputed in the instant case that the District Court sentenced Lopez-Rosado under the mandatory Sentencing Guidelines framework in effect prior to Booker. The Government thus concedes that Lopez-Rosado should be resentenced.

Furthermore, in the instant appeal the other sentencing issues that Lopez-Rosado raises are best determined by the District Court in the first instance. See id. at 166. The Government also concedes that “[a]ny matter that the Appellant wishes to raise at that time concerning the enhancement for role in the offense or regarding drug *188 quantity can be taken up before the district court.”

Accordingly, we will vacate the sentence and remand this case for resentencing in accordance with Booker and Davis.