There's a bad news for the millions of users of both Samsung Galaxy S and the 7-inch Galaxy Tab - the South Korean tech giant has confirmed that these two devices will not get the Android 4.0 “Ice Cream Sandwich” upgrade.

The main reason for this is Samsung's customized TouchWiz interface on the devices. There is not enough RAM and ROM to run both Android 4.0 and TouchWiz, the Verge  reported.

Recently, Samsung announced that Galaxy S II phones will be upgraded with Ice Cream Sandwich in early 2012. The latest announcement comes as a big blow to those who are using these devices.

However, Nexus S, which is also built by Samsung and shares a lot of hardware specs with the Galaxy S series, will get Android 4.0 upgrade. This is possible, the company explained, because the smartphone, runs on the basic Android OS, thereby making available more resource for the Ice Cream Sandwich upgrade.