 After the release of B 'Day, and before "Upgrade U"' s official release as a single, the song gained popularity on R & B and hip hop radio stations in the United States. Consequently, it entered the US Hot R & B / Hip-Hop Songs chart, and later the US Billboard Hot 100 chart at number 92 in the issue dated November 18, 2006. After its release as a promotional single, it reached a peak at number fifty-nine on the Hot 100 chart and a peak at number 11 on the R & B / Hip-Hop Songs chart. The song re-entered the "Hot 100" chart on four occasions: it first fell out of the chart on January 13, 2007; re-entered on January 20, 2007, at number 94 and charted for two weeks only; it re-entered the chart on February 10, 2007, and was given the title of 'Best Comeback', though it fell off the chart the following week; it re-entered seven weeks later on March 24, 2007, at number 98, and stayed there for two weeks; The song made its last comeback on the Hot 100 chart on April 14, 2007, at number eighty, once again gaining the title of the 'Best Comeback'. This time it remained in the chart for five weeks. Overall, it remained on the Hot 100 for eighteen non-consecutive weeks. Although not officially released in the United Kingdom, "Upgrade U" charted for three weeks on the UK Singles Chart and peaked at number 176 on May 19, 2007.
