Many tablet-based data gathering systems are Web enabled Mobile Systems. Our systems are designed to work on any tablet (iOS, Android, Windows 8), through the upload and download of data into / from Cloud-based Systems.
Availability of signal is addressed by data being cached until signal is found.
The Operating System of the Mobile Device does not affect the effectiveness of the Web-based System:
You can run your data system using any device with internet capability
This is the most effective way of dealing with big data on mobile systems.