Data usage through any Android Smartphone should always be optimal. In order to ensure that you are using the data optimally one needs to customize the amount of mails being sync to his/her device. One can easily manage the data usage in Gmail by Label, Choosing All, Last 30 Days or None on His/Her Android 4.0 Ice Cream Sandwich Device.
How to Optimize Gmail Mobile Data Usage ?
In order to lower the Mobile data usage by Gmail first turn off the sync for Inbox, Priority Mail and other labels that are currently syncing as concerned by the user. Once these syncs are disabled then the users conversation list shall be updated only when the user views the label for the first time or when the user touches the Refresh option.
If you want to deactivate the Inbox Sync in Gmail ?