This section describes the common principles of text editing, focusing on Latin based scripts. Requirements of other writing systems and input methods, such as those used for Chinese or Arabic, are not covered in detail.
Character input is accomplished using the numeric keys. The ITU-T standard for numeric keypads specifies the mapping of Latin (English) characters to the keys, assigning three or four letters to each numeric key from 2 to 9. As described earlier, Symbian Belle also supports the QWERTY keyboard. The input of a specific character can happen either by repeated key presses within a timeout, or by using some language-specific algorithm that tries to find the correct characters according to the produced key sequence.
The three available modes are:
ITU-T in multi-tapping mode.
ITU-T with predictive mode
QWERTY keyboard with prediction settings