Please try to use the software ifunbox replace files , the software will automatically adjust the file permissions to shirk a lot of needless difficulty ! 
 
 First, the system is divided into three fonts , Chinese font system ,
Women's Supra Vaider Shoes, the system in English fonts , the lock -screen desktop time display fonts. 
 here namely the system fonts Chinese and English languages which do not mean the uncomplicated mobile call ,
Supras, Traditional Chinese and English ,
Kids' Supra Skytop Shoes, but while you phone as the Chinese language, when the mobile phone text display in Chinese and English fonts , corresponding to three two fonts files ( 2 Chinese , one English ,
Supra Shoes, see the next tutorial ) 
 
 tutorial began : 
 
 Here are ways to change the font : 
 
 ( use iFunBox is no escape , merely escape before the iphone can only discern the inside of the found file , in array to entirely use ifunbox need to jailbreak and setup afc2 patch , do not fret about the other rights issues , ifunbox ambition automatically set permissions ) 
 
 with iFunBox open iphone4 the / System / Library / Fonts / Cache direcotry ,
Women's Supra TK Society, you will see a lot of files , the other not control, we only need to replace the corresponding file above it . 
 
 STHeiti-Light and STHeiti-Medium is the Chinese role corresponding 
 HelveticaNeue ( may be _H_HelveticaNeue) corresponds to the English font 
 LockClock correspond to the time of the lock -screen desktop display font 
 
 the following are various system fonts , download straight replacement quickly , we suggest that you 1st back up what the incipient font replacement , fair in circumstance Well 
 
 Note : very small part of the font with Chinese input method conflict ,
Supra TK Society Shoes, conflict , reinstate or replace anyone other fonts !