If you are interested in testing version next Android BETA version prior to the formal production release,
You may do so by joining the Salesforce1 for Android Early Access Google+ Community URL:
( https://plus.google.com/communities/106940882533156340893 )
Please note the early access version is a beta; it is near production quality but has known limitations. Once you join the Google+ Community, you must opt-in to the beta at this link. (https://play.google.com/apps/testing/com.salesforce.chatter), which will be made available through the Salesforce1 listing in Google Play. If you have Salesforce1 installed already, you can simply update the app to get the latest beta. We aim to make the beta version available 1-2 weeks prior to the standard release, but ask that you follow the Google+ Community for more precise updates.
**Approvals for group invite requests may be delayed based on the volume of requests.