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I am confused. You said that calls are going to voicemail but when colleagues at work called you the calls came through. The fact that they were sitting next to you is not important as they would still have gone though the external phone network like anyone else.
So is the problem happening in just one place or lots of other places? Please give us some more advice.
As it happens I had this problem this morning and it was caused by my Sure Signal. I turned that off and all was fine. I turned it back on a but later and the problem has cleared itself.
It could well be a network issue if the network is busy or there is a problem with the local mast. Have a look on the fault boards where you can search by network to see if there is an issue locally. Where in the UK are you?
I would also re-boot the phone by holding down the sleep and home keys for around 15 seconds ignoring all prompts until you see the Apple logo. You don't lose any data and it is the equivalent of re-booting a computer.
I find this happens to me a lot in Central London because the network is congested.
Is this still happening today? We've not had any faults tjhat would explain this reported to us, i think it may be more a case that the signal may have fropped on your handset for a period of time - if you're still missing calls let us know and we can investigarte further.
In the meantime, dial *#105# into your handset and press call - this will displlay a date and time on your screen - the top ones should be within the last 24 hours, and ideally within the last 2 hours - if it isn't then restart your handset to refresh it on the network.
Let me know if you need any more help
The numbers just show the last time your SIM connected to the network. If the date displayed isn’t today’s date then please follow Pauls instructions so that your SIM updates.
If there was any issue this should hopefully resolve it. If you still experience problems let us know and we'll investigate further.
Hi just upgraded to iPhone 5 and having exactly the same problem. Researching online there are other discussions going on about it too For different networks and all suggest the same troubleshooting but none seem to resolve it. Through trying different things it seems to be that if I'm using the phone,I.e Facebook or kindle or messaging the call comes straight through. If the phone is in idle mode it goes to answer machine but if the person immediately calls back it comes through...my husband does this now but very frustrating! Tried this at home by calling my phone and its the same...if the screen is on the call comes through if its gone dark it goes to answer machine. Mine immediately says missed call. Incidentally my husband didn't upgrade and still has his Samsung galaxy and doesn't have the same problems even when our phones anext txt to each at home with full signal and wifi. Any suggestions??
I can confirm that my do not disturb is switched to off and have also tried ##002# to cancel any diverts.
It is strange as the first time the phone does not ring and go to voicemail. However, as soon as the same person calls back straight away, it connects and my phone will start ringing.