Dead phone, missed phone call, no notification.

[EJP]

I revived a phone call whilst my phone was completely dead after handing my number over to someone for a very important business opportunity, however when an iPhone is completely dead it leaves no notification of a missed call. Is there any way I can find the number of the person whose call I missed from the O2 network? Thanks!

[pgn]

Unless you had O2 voicemail switched on at the time that call was received, and it diverted to voicemail without being a "number withheld" call, then the voicemail message should have the number if the caller did not hang up before leaving a message, @EJP - otherwise, no, sorry.