I guess it could partly depend on the value of the different variants of the phones and what offset Optus offers on the handset component of the contract for each one (sometimes this “discount” varies quite a bit). I would assume that the 512 GB version is much more costly than the 128 GB version and that a $16 a month price increase over a 2 year period, taking into account any variations in the discount offered may still not adsorb the extra cost even with a smaller data plan. I could be wrong in this assumption as I do not follow the pricing of these items. Perhaps that could be checked?
The “free of charge” may be referring to the cost of moving from a previous phone to a new/er phone earlier than a normal contract would allow and I guess the T & Cs of the plans would need to be read to see if that is the case??. EDIT: It normally costs $99 to do the changeover.
I don’t think 10 GB a month would affect the price drop to the $79 per month and the $95 might reflect a bargain insofar as Optus offers “bargains” on the handset (by my reckoning the prices paid for mobile data are mostly ripoffs but that is another topic altogether).
Checking their SIM only plans shows that a “on special” 30 GB plan (which is a special offer giving the normal 15 GB data allowance another 15 GB bonus data a month) will cost $36 a month (was $45 a month with only the 15 GB originally) and that for $35 a month you get 6 GB of data, there is no 20 GB plan. The next plan up originally was 25 GB but has doubled on the special to 50 GB and now costs $44 a month from it’s normal $55 a month. This special offer ends 2/9/18.
Went and checked the Optus deals, they do state the plans on the Galaxy Note start at $89 to buy a phone. The $79 a month refers to leasing the 128 GB phone for the 2 years ie it is their $79 data call plan (a special plan only for the 128 GB one) & $0 leasing costs, the 512 GB one for the leasing starts at $45 data call plan and $50 handset leasing cost ie $95 per month. To buy the handsets on the plan costs are starting from $89 for the 128 GB model ie $79 data call plan and $10 handset cost, the 512 GB starts at $105/mth ie $45 data call plan (2 GB a month data) & $60 handset fee. There is no $79 data call plan for the 512 GB.
All this shows that you can’t really compare the 128 GB costs to the 512 GB costs. They are both quoting differing starting points re the data call plans and the offset they require on the handsets is widely different with the 512 attracting a much heftier handset cost and this handset cost varies even on the same phone depending on which data allowance you buy into.
If you compare the two based on the same 2 GB plan ($45 a month data & call) the 128 costs $95 a month (handset cost is $50 a month in this one) and the 512 at the above noted $105 a month. So the 512 GB getting 20 GB a month for $95 a month was a bargain compared to the $115 a month it now costs to get that same 20 GB and anyone who then purchased it on that special offer are probably feeling very happy.
Checking the RRP of both phones it would seem that signing up for the handset as part of the contract can save you a few hundred dollars.
If we take the 128 GB one and use the $89 per month purchase plan ($10 handset fee ) the handset would cost you $240 to buy it. If bought outright the cost is about $1,499. At worst on the plans you pay a $50 handset fee so $1,200 over the contract period saving about $300 on outright purchase cost, and on the best handset cost ($145 per month 200 GB plan) the fee is $0 so the phone costs you nil.
The 512 GB one costs about $1800 outright but at the worst handset cost point ($60 a month handset cost) you would pay $1440 for the phone saving about $360 and at the $145 plan you again pay $0 handset cost so the phone costs you nothing. There is a special plan cost for the 512 one which is $142 a month giving a data allowance of 100 GB and the handset cost is $17 a month but for another $3 a month you get an extra 100 GB and the noted $0 handset cost.
What this all means is that there is no rhyme or sense to the way plans and handset offsets are calculated and perhaps this confusion is what these companies aim for so they can never be pinned down to any devious practices…well not often anyway.