Users of the first Android phone, the G1, may be unable to get significant future operating-system updates because the phone's internal flash is nearly full.

We interrupt your steady stream of iPhone rumors to bring you new buzz on that other famous smartphone: the Android-powered T-Mobile G1. While its successor, the T-Mobile G2 (aka HTC Magic) has yet to hit America, there's now talk of a "T-Mobile G1 v2" that could be coming soon to a store near you.

The Android 1.5 update for G1 smartphones, dubbed "Cupcake," began arriving on some of the devices over-the-air Thursday, according to G1 owners reporting on blogs and forums.

T-Mobile USA sold 1 million G1 smartphones in the first six months since it went on the market, about one-third the number of Apple Inc. iPhones that sold in its first two quarters.

High Tech Computer (HTC) unveiled its second Google Android-based smartphone, the HTC Magic, with mobile service provider Vodafone on Tuesday.

HTC has partnered with Optus to release the first mobile phone in Australia based on Google's Android platform, the Dream.

A noted security researcher Monday warned users of T-Mobile's G1 smart phone that a critical vulnerability in Google's Android operating system could be used to hack their phones.