ORDER AND JUDGMENT*
Defendant-Appellant Contreras-Castellanos appeals the district court’s dismissal of his § 2255 motion asserting two ineffective assistance of counsel claims. We AFFIRM.
BACKGROUND
Contreras-Castellanos was indicted along with eight others on various charges involving the distribution of controlled substances. Specifically, Contreras-Castellanos was charged with: (1) one count of conspiracy to possess with intent to distribute, and to distribute methamphetamine and cocaine, in violation of 21 U.S.C. §§ 841(a), (b)(1)(A), and 846; (2) one count of distribution and aiding and abetting in the distribution of methamphetamine, in violation of 21 U.S.C. § 841(a) and (b)(1)(B) and 18 U.S.C. § 2; and (3) one count of illegal re-entry by a deported alien, in violation of 8 U.S.C. § 1326(a)(2). He pleaded guilty to illegal re-entry but went to trial on the remaining two counts. Despite his trial testimony that he was not involved in the drug trafficking activities, the jury found him guilty on the conspiracy count. They did, however, acquit him on the distribution count. The district *775court sentenced Contreras-Castellanos to 188 months on the conspiracy count and a concurrent twenty-four months on the illegal re-entry count. On direct appeal, this court affirmed his conviction. United States v. Contreras-Castellanos, 56 Fed.Appx. 904 (10th Cir.2003).
Contreras-Castellanos later filed a motion to vacate, set aside, or correct his sentence pursuant to 28 U.S.C. § 2255. He argued two errors in the proceedings below, both grounded in the theory of ineffective assistance of counsel: first, that his counsel failed to explain to him how the concept of “relevant conduct” was applied in a conspiracy case; and second, that his counsel failed to explain how certain portions of the United States Sentencing Guidelines could have applied in his case. The district court denied his motion, determining Contreras-Castellanos failed to show that his counsel’s performance was constitutionally deficient and that, even assuming he had, he did not show that he was prejudiced.
We granted Contreras-Castellanos’s request for a certificate of appealability (“COA”) on both of his ineffective assistance claims.
DISCUSSION
When considering the denial of a § 2255 motion, we review the district court’s legal rulings de novo and its factual findings for clear error. United States v. Orange, 447 F.3d 792, 796 (10th Cir.2006).
A claim for ineffective assistance of counsel presents a mixed question of fact and law, which we review de novo. In order to establish a successful claim for ineffective assistance of counsel, [a defendant] must show (1) that counsel’s performance was deficient, and (2) that this deficient performance prejudiced his defense, depriving him of a fair trial with a reliable result.
Id. (citations omitted). Further, “[t]o prove deficient performance, [a defendant] must show counsel’s representation fell below an objective standard of reasonableness.” Sallahdin v. Gibson, 275 F.3d 1211, 1235 (10th Cir.2002). And “[t]o establish prejudice, [he] must show that, but for counsel’s errors, there is a reasonable probability the result of the proceeding would have been different.” Id. Finally, a defendant must establish both prongs in order to succeed on his claim; thus, “a failure to prove either one is dispositive.” Orange, 447 F.3d at 796-97.
We conclude that, even assuming that counsel’s performance was deficient, Contreras-Castellanos has failed to meet his burden to establish prejudice on either claim.
I. Ineffective Assistance Based On Counsel’s Failure To Explain “Relevant Conduct” In A Conspiracy Case
Contreras-Castellanos argues that his attorney advised him that, were he found guilty of conspiracy, he would be held responsible for only the 948 grams of drugs confiscated by the government during its drug investigation. He claims he was never informed that he could be held accountable for the 9.27 kilograms involved in the larger conspiracy. He further contends that, had he understood the potential sentence he was facing, he would not have proceeded to trial.
Even assuming that counsel’s performance was constitutionally deficient,1 Contr*776eras-Castellanos has failed to demonstrate prejudice. As noted, Contreras-Castellanos argues that, had he known about the proper application of the “relevant conduct” guideline, he would have pleaded guilty and not gone to trial. However, as the government points out, the defendant provides no evidence or argument that the relevant conduct attributed to the defendant would have changed based on a guilty plea. The defendant was assessed 9.27 kilograms of methamphetamine in the PSR, meaning he fell into the drug quantity range of “[a]t least 5 KG but less than 15 KG,” which results in a base offense level of 36. His co-conspirators—each of whom did plead guilty—were assessed the same base offense level. See United States v. Montoan-Herrera, 351 F.3d 462, 463 (10th Cir.2003); United States v. Topete-Plascencia, 351 F.3d 454, 456 (10th Cir.2003); United States v. Jimenez-Oliva, 82 Fed.Appx. 30, 32 (10th Cir.2003) (unpublished); United States v. Virgen-Chavarin, 350 F.3d 1122, 1126 (10th Cir.2003). Thus, as there is nothing to suggest that Contreras-Castellanos would have faced a lower base offense level had he pleaded guilty (upon a correct understanding of the relevant conduct calculation), he has failed to meet his burden of showing “a reasonable probability the result of the proceeding would have been different.” Sallahdin, 275 F.3d at 1235.
II. Ineffective Assistance Based On Counsel’s Failure To Explain Sentencing Guidelines’ “Safety Valve” Reduction
Contreras-Castellanos also argues that his counsel was ineffective for failing to explain the so-called “safety valve” provision of the sentencing guidelines.” If a defendant meets certain criteria, including (as relevant here) “truthfully providing] to the Government all information and evidence the defendant has concerning the offense” before the sentencing hearing, he is entitled to a two-level reduction in his base offense level, even if the reduction results in a sentence below the statutory mandatory minimum. 18 U.S.C. § 3553(0(1X5); see also U.S.S.G. §§ 2D1.1 and 5C1.2.2 Contreras-Castella*777nos claims that, had counsel explained this provision to him, he would have “provided a complete and truthful disclosure as to all the facts required to meet the statutory requirements.”3
Even if this counsel’s action was constitutionally deficient, Contreras-Castellanos has not shown how he was prejudiced by the lack of opportunity to attempt to qualify for the reduction. Contreras-Castellanos does not explain what information he would have disclosed in order to satisfy the provision. Even so, he would have had to disclose one of two things; either (1) that his testimony during trial was accurate and he did not participate in or know about the drug trafficking scheme; or (2) that he did not tell the truth during trial and he was, in fact, involved in the conspiracy. Neither confession, per se, disqualifies him from the reduction. See 18 U.S.C. § 3558(f)(5) (“[T]he fact that the defendant has no relevant or useful other information to provide or that the Government is already aware of the information shall not preclude a determination by the court that the defendant has complied with this requirement.”); United States v. Jeffers, 329 F.3d 94, 99 (2d Cir.2003) (noting that a defendant’s perjury does not disqualify him from the safety valve reduction if he “comes clean” before sentencing). However, under either approach, Contreras-Castellanos has not shown a “reasonable probability the result of the proceeding would have been different.” Sallahdin, 275 F.3d at 1235.
Although Contreras-Castellanos claimed at trial that he was not involved in the drug trafficking activities, the jury found Contreras-Castellanos guilty of conspiracy; on direct appeal, we affirmed that there was sufficient evidence to support this verdict. Contreras-Castellanos, 56 Fed.Appx. at 906-07. In light of this, had Contreras-Castellanos attempted to qualify for the reduction by maintaining his innocence, there is simply no reasonable probability that the court would have found that he had met his burden of “truthfully providing] to the Government all information and evidence the defendant has concerning the offense.” 18 U.S.C. § 3553(f)(5); see also Virgen-Chavarin, 350 F.3d at 1129 (noting that it is the defendant’s burden to prove, by a preponderance, that he has satisfied each criterion).
If, on the other hand, Contreras-Castellanos attempted to qualify for the safety valve reduction by admitting that he was involved in the conspiracy, he would have exposed himself to a two-level sentencing enhancement for obstruction of justice. U.S.S.G. § 3C1.1. We have no reason to think that such an enhancement would not have been sought and applied. See Jeffers, 329 F.3d at 99 (noting that where a defendant perjures himself at trial but then “comes clean” before sentencing, he is not disqualified from the safety valve reduction but his “perjury is accounted for in the enhancement for obstruction of justice under U.S.S.G. § 3C1.1.”). Thus, even if Contreras-Castellanos received the two-point reduction under the safety valve, there is no reasonable probability that he would not have also received a two-point enhancement for obstruction.
In short, as we cannot conclude that Contreras-Castellanos would have faced a lower sentence under either scenario, he has not met his burden to show that counsel’s failure to inform him of the safety valve provision, even if deficient, caused him prejudice.
*778CONCLUSION
For the foregoing reasons, we AFFIRM the district court’s denial of ContrerasCastellanos’s § 2255 motion.4