https://www.optus.com.au/shop/broadband/fusion/broadbandplan/109 features 500 GB of internet data, unlimited local calls, unlimited national calls and unlimited Australian mobile calls.
Average call cost was determined for local calls, national calls, mobile calls and international calls for a period of 12 months. The results are in the table below.
It appears that the benefits of Optus ‘yes’ Fusion $109 does not have any impact on cost savings due to the fact that majority of the call costs are for international calls.
Considering that on average, total call cost is $129.74, the cost for telecommunication come to $219.59 per month.
Assuming that $50 per month was spent on Fone2 for international calls, the total cost for telecommunication can be reduced  to $154.11.
This is a monthly saving of $65.48 compared to current costs.
By switching to Optus ‘yes’ Fusion $109 and upgrading to World Saver Plus for $10 per month, for $119 altogether per month, unlimited local calls, unlimited national calls, unlimited mobile calls and X cents per minute international calls to Country X can be achieved. It is important to mention that only calls to landlines are allowed under World Saver Plus rates.
To make the same amount of calls under Option 1, it only requires further $31.25. The revised telecommunication cost satisfying requirements of Option 1 is $150.25 per month.
This is a monthly saving of $69.34 compared to current costs.
Optus has applied to participate in the Government's filtering trial . This means certain sites can be blocked as per Optus’ will. iiNet has not showed any willingness to consider this trial.
Optus provides 500 GB of data compared to iiNet’s 200 GB.
Optus provides unlimited mobile calls to Australian numbers. iiNet does not offer unlimited mobile calls to Australian numbers.
The monthly saving of Option 2 compared to Option 1 is only $3.86.
Fone2 provides the flexibility of calling to landlines as well as mobiles in Country X at a cheaper rate.
It is recommended to continue with Option 1 for another 12 months and reconsider available options.
 Call costs calculation https://docs.google.com/spreadsheet/ccc?key=0Asbn69SjUbBNdFNvYklTeEM2RC1iTlRraVlCcEd6Tmc#gid=5
 World Saver Plus call rates http://optus.custhelp.com/ci/fattach/get/103875/1314854054/redirect/1/session/L2F2LzEvdGltZS8xMzM1MTg3MDQ4L3NpZC9kTTZybm1Xaw==
 Chat with Optus staff regarding World Saver Plus https://docs.google.com/file/d/0B0ywocRL7KCFX1Zsdnh0WUZrMVk/edit
 Internet Content Regulations
 Netgear ADSL2+ MODEM ROUTER DG834