BenQ S700 - Manual (Page 56)

40 Using Your Phone
screen to directly dial the voicemail phone number and listen to your
voicemails. Alternatively, you can go to the menu:
Messages >
Voicemail > Get Voicemail to make a voicemail call.
If the voicemail number is not stored on your SIM card or in the phone
itself, you will not be able to access your voicemail by long-
pressing ,Generally speaking, network operators will store the
voicemail number on a SIM card before giving it to you. If so, you will
be able to dial your voicemail number by long-pressing when
the phone is in standby mode, without needing to first manually store
this number. If however your network vendor did not store the number
on your SIM card, you will need to do this yourself. To save or modify
a voicemail phone number, go to the menu Messages > Voicemail >
Settings > Box Numbers.