A new survey released on Monday shows that Apple’s iOS mobile operating system continues to lead it competitors.

[ad#Google Adsense 300×250 in story]According to the survey conducted by ChangeWave, 46 percent of respondents planning to purchase a smartphone in the next 90 days will choose an iPhone. This compares to 32 percent that plan to purchase an Android-based phone.

The survey, which polled 4,163 consumers in North America, also showed that RIM reached its lowest point ever, dropping down to 4 percent of planned purchases.

Android made quite a bit of ground in September 2010 when it peaked at 37 percent, almost catching Apple’s 38 percent. Since then, Apple has gone up to 46 percent, while Google has dropped to 32 percent.

The news for Apple’s customer satisfaction is good too. A full 70 percent of people said they are very satisfied with iOS, while 50 percent say they feel the same way about Android. Only 27 percent were satisfied with Windows OS and 26 percent with RIM’s OS.

iCloud will also become a big draw for Apple when it is released. ChangeWave found that “29% of Apple product owners say Apple’s iCloud announcement makes them More Likely to buy Apple products in the future, as do 13% of Non-Apple owners.”