Standard call rates always seem to lurk in the background of mobile plan advertisements; included call value appears in bold, while call rates appear in fine print.Today we bring call rates out of the shadows and into the spotlight so you can compare mobile phone plans in more detail. Bear in mind while one mobile phone plan provider may offer cheaper call rates, another may offer a larger amount of included call value. Call rates are also subject to change.Below are some of the most popular mobile phone plans available, along with their call rates for calling from one network to another (some plan providers offer discounts for calls to the same network). These rates do not include any applicable call connection fees.Prepaid:Telstra: 40c per 30 second block or partOptus: 10c per 30 secVodafone: Flexi Cap: 44.5 cents per 30 secondsVodafone: TXT and Talk Recharge: 39 cents per 30 seconds3: 44 cents per 30 secondsVirgin Mobile: Your Cap Prepaid: 45 cents per 30 secondsPost-paid low-end:Telstra Mobile phone Plan $30: 46c per 30 second block or partVodafone $29 Cap plan: 45 cents per 30 seconds3Mobile $29 Cap plan: 45 cents per 30 secondsVirgin Rollover Cap $29: 45 cents per 30 secondsPost-paid mid-range:Telstra 3G Cap Plan $49: 40c per 30 second block or partOptus ‘yes’ $49 Cap: 40 cents per 30 secondsVodafone $49 Cap plan: 45 cents per 30 seconds3Mobile $49 Cap: 45 cents per 30 secondsVirgin Rollover Cap $49: 45 cents per 30 secondsPost-paid high-end:Telstra Mobile Phone plan 80: 26c per 30 second block or partTelstra 3G Cap Plan $79: 35c per 30 second block or partOptus ‘yes’ $79 Cap: 39 cents per 30 secondsVodafone $79 Cap plan: 45 cents per 30 seconds3Mobile $79 Cap: 45 cents per 30 secondsVirgin Rollover Cap $79: 45 cents per 30 seconds(Note: Virgin Mobile Cap Plus plans are charged at the same rate as the Virgin Rollover Cap plans).