We have 3 mobile phones with BT and while on a trip to Spain I have found that calls on two of the phones go directly to voicemail. The roaming and international call settings are enabled and all diverts are disabled, I have read through the various forums and followed the advice of using 15710 etc to switch off voicemail. I eventually realised that one phone had a spend cap of £2.50 and the other 2 were set to £0. This should be fine as we all have plenty of minutes on our accounts and roaming is now free in Europe. However setting a £2.50 limit on all accounts solves the problem.