I have upgraded my version to 3.00. Use mobile theme. Add some products to cart and then goto cart. Click on checkout. The login redirection fails and cart stays on the same page.
I have tried it with demo front end too. The same problem exists.
I have checked it on google nexus with android 4.0.1 and Opera mobile browser. the browsers I checked on windows phone are IE 10, UC browser and nokia express browser.