Communicate with PC at baud rate :115200 bps

[skimask]

I can communicate at 9600 with higher than this the data is not true it's corrupted

2- 4MHZ or 8MHZ crystal
3- PIC16F877A or PIC18f452 or PIC4220

Says right in the back of the manual that a faster clock speed than 4Mhz will most likely be needed with a 4Mhz crystal, like quite a bit faster.
If you're using a '452, turn on the 4xPLL and use the 8Mhz crystal. That'll give you 32Mhz to play with.