Huawei Honor 3C H30-U10 User Guide - Manual (Page 50)

Internet connection
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to display its data usage details. Then touch and select the Restrict
mobile bkgd. data check box.
Restricting automatic data synchronization
Restricting automatic data synchronization helps save data traffic and battery
power. After this function is enabled, you have to manually synchronize your
accounts.
1. On the home screen, touch then the All tab.
2. Under WIRELESS & NETWORKS , touch More… .
3. Touch Data usage .
4. Touch and clear the Auto-sync data check box.