在北京如何接收香港打出的電話？

the cheapest way is u buy a local sim card 1st...
then apply idd divert call service like 1507...(service fee is ~hkd10/month)
if people who call your hk mobile nbr...
the line will divert to yr china mobile nbr....
people just like to call u as usual...
no need to pay any international call fee...
and u just need to pay the idd fee call from hkg to china....
compare with u use the roaming service...
it's much cheaper...

IDD飛線漫遊使用程序
1. 只需於離港前，將您的香港電話號碼轉駁至您的飛線漫遊號碼，IDD飛線漫遊服務立即啟動
2. 飛線 :
固網 - *05 + IDD飛線漫遊號碼
手提 - **21* + IDD飛線漫遊號碼 + # + 打出
取消 : 固網 - #05
手提 - ##21# + 打出