Seeking a first T20 World Cup appearance, the United States were far too strong for Singapore despite the Asian nation being ranked six places higher.
"(Ben Stokes is) Incredibly special. He is someone I look up to and always turns up when the team needs him. People question him (Stokes), but there's no questioning him... he's the man!" said Curran in the post-match presentation ceremony.
England, on their first Test tour of Pakistan in 17 years, won the first Test in Rawalpindi by 74 runs and the second in Multan by 26 runs.
Needing 263 runs with eight wickets in hand on Day 5, Pakistan was dismissed for 268 against the reverse swing of James Anderson (4-36) and Ollie Robinson (4-50) — losing its last five wickets for just 11 runs after tea.
England, who had been facing almost certain elimination had they lost, moved into the top two in Group 1 along with their opponents with one round of matches to go.
England, which bagged a 79-run first innings lead, reached 89-3 at tea on the second day with Ben Duckett (58 not out). It was a rare quiet session by England after it beat Pakistan by 74 runs in the first Test thanks to an ultra-attacking batting display.
Stokes said it was "a very special time to be an England cricketer" but that the team need to keep their feet on the ground. "One thing we do is we stay in the moment," he said.
Openers Zak Crawley (122) and Ben Duckett (107) set the tone with quick-fire tons against a hapless Pakistan bowling attack before Ollie Pope (108) and Harry Brook (101 not out) compounded the hosts' misery.
"The PCB and ECB are in discussions regarding the commencement of the 1st #PAKvENG Test as some England players are down with viral infection," the board said on Twitter. "The PCB continues to monitor the situation, is in contact with the ECB.."