http://www.google.com.au/search?hl=en-AU&source=hp&q=phone+upgrades&gbv=2&oq=phone+upgrades&gs_l=hp.1.0.0l10.1158815.1171139.0.1173011.14.10.0.4.4.0.250.1589.2-7.7.0...0.0...1c.TarnMYoLlKo
helps if you tell us the phone :)
This is a Simple Dialog Demo.