Data synchronization methods for synchronizing data in communication system and communication systems

A data synchronization method for synchronizing data in a communication system comprising a mobile device, comprising:

• connecting the mobile device to an account server;
• wherein the account server comprises a first data record of an account and the mobile device comprises a second data record;
• performing a first synchronization procedure to synchronize data between the first data record of the account server and the second data record of the mobile device according to a first identification data;
• connecting the mobile device to an data server;
• wherein the data server comprises a third data record;
• and
• performing a second synchronization procedure to synchronize data between the synchronized second data record of the mobile device and the third data record of the data server according to the first identification data and a second identification data,
• wherein the first identification data represents a specific location where a data record of the second data record is stored and the second identification data represents a specific location where the data record is stored in the third data record.

A communication system, comprising:

• an account server, comprising a first data record of an account;
• a mobile device connected to the account server, comprising a second data record;
• and
• a data server connected to the mobile device, comprising a third data record,
• wherein the mobile device performs a first synchronization procedure to synchronize data between the first data record of the account server and the second data record of the mobile device according to a first identification data, and after the first synchronization procedure has been completed, performs a second synchronization procedure to synchronize data between the synchronized second data record of the mobile device and the third data record of the data server according to the first identification data and a second identification data, wherein the first identification data represents a specific location where a data data represents a specific location where the data record is stored in the third data record.

A communication system, comprising:

• a mobile device for connecting to an account server, wherein the account server comprising a first data record and the mobile device comprising a second data record;
• and
• a data server for connecting to the mobile device, wherein the data server comprising a third data record,
• wherein the mobile device performs a first synchronization procedure to synchronize data between the first data record of the account server and the second data record of the mobile device according to a first identification data, and after the first synchronization procedure has been completed, performs a second synchronization procedure to synchronize data between the synchronized second data record of the mobile device and the third data record of the data server according to the first identification data and a second identification data, wherein the first identification data represents a specific location where a data record of the second data record is stored and the second identification data represents a specific location where the data record is stored in the third data record.