✔ 最佳答案
No one EVER says 'call back to....' - that's Chinese-English!! NEVER EVER say that!
The correct ways are:
Please call him back.
Please give him a call back.
Please return his call.
2008-06-21 20:36:44 補充:
To the 2nd poster from the top: it'd be best if you check the grammar of your sentenes once again.