Very few people have received Android's Ice Cream Sandwich software update for the Galaxy S2 since Samsung announced it would be rolling out on March.19.

The upgrade has started rolling out on the U.K's O2 network, but Vodafone, T-Mobile and Orange customers will have to wait for the operators to finish testing the update on their devices, according to Tech Radar.

Samsung UK is working hard to bring Android 4.0 (Ice Cream Sandwich) to our Galaxy S II customers. We are unable to confirm exact dates as the software testing and approval process is subject to several variables, but we are working as quickly as we can. Thank you for your patience, the company wrote on their Facebook page.

Poland, Hungary, Sweden and Korea are next in line to receive the upgrade before the U.S, but with the current delay the wait could be longer than anticipated. In a recent announcement, the U.S. carrier Verizon said the upgrade would be coming to Samsung devices in the near future, but no date was specified.

Meanwhile, AT&T became the first U.S carrier to bring the Android 4.0 updates to one of its devices on Friday. The operator has started rolling out the update on the HTC Vivid. AT&T also revealed other devices that would be getting the update in the future. These included:

LG Nitro, Motorola ATRIX 2, Motorola ATRIX 4G, Pantech Burst, Pantech Element, Samsung Captivate Glide, Samsung Galaxy Note, Samsung Galaxy S2, Samsung Galaxy S2 Skyrocket and Samsung Galaxy Tab 8.9.

Other Samsung devices that will receive the upgrade include, the Galaxy Note, Galaxy S2 LTE, Galaxy R, Galaxy Tab 7.0 Plus 7.7, 8.9 and 10.1

The company has also announced the status of Android 2.3 Gingerbread updates. Samsung Electronics has completed upgrading the Galaxy devices to Gingerbread last year by providing software upgrades to both Froyo and Gingerbread, said Samsung. With the ICS upgrade, Samsung Electronics has solidified its position as the leader of Android devices.

A firmware update for Gingerbread devices will also roll out at the end of the month on devices including the Galaxy S, Galaxy Tab 7, Galaxy S Plus, Galaxy S SCL (Super Clear LCD), and Galaxy W.