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424 posts

Ultimate Geek
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Topic # 24712 31-Jul-2008 18:00
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Thanks to the nice people here on Geekzone, I found out that Vodafone were ending their prepay users transferring to the Motormouth plan on prepay.  Hmm, I thought, something up here, so headed to DSE to buy a connection pack and changed it over to Motormouth (text the word Motormouth to 756 after having set up your account pin).

However, smelling at rat, I decided to do a little maths.  There are a few 'supposes' here, everybody has a different call distribution but I decided to just choose one that seemed ok. 

Suppose a person calls half land-line and half cellphones.  For the calling cellphones let's suppose it's equally half Telecom and half Vodafone.

Calculating:

Motormouth:
land-line 0.5 * 49c/min = 0.245

Cellphone VF 0.25 * 49  = 0.245

Cellphone TC 0.25 * 139 = 0.3475


Total averages 71.5c/min



Superprepay

all calls cost 89c/min.

But wait, there's more.  Super Prepay rounds calls up to the nearest minute, but the old 'classic plans' round to the nearest second.  So, let's suppose the average call is 5 minute (I'm guessing here, my calls are always shorter but I wanted to be charitable) so you are looking at a rounding up of an average of 0.5 minute which is 10%.  Shorter calls have a higher rounding percentage.

So 10% rounding up of 89c/min = 0.979, which is 37% higher than Motormouth.


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355 posts

Ultimate Geek


  Reply # 153082 31-Jul-2008 18:11
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Obviously the supa prepay plans are more expensive. I would assume this allows them to add TXT2000 and bestmate without jeopardizing profits. This debate has already occured when everyone found out the addons were only available on supa prepay but most people are happy to live with the trade-off.

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Uber Geek
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  Reply # 153086 31-Jul-2008 18:21
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JoeBloggs: Obviously the supa prepay plans are more expensive. I would assume this allows them to add TXT2000 and bestmate without jeopardizing profits. This debate has already occured when everyone found out the addons were only available on supa prepay but most people are happy to live with the trade-off.

Exactly.

They have never stated that Supa Prepay was the cheapest Prepay plan that Vodafone have released. They have labelled it "flexible".

It does, however, completely disadvantage all new Prepay customers from 1st August.

I switched to Motormouth because I have knew about the savings that I can get with it when I got my connection pack in May. I don't text often, and I don't use enough to get Free Weekends, and I don't specifically call or text to any one person.

For extremely low users though, it won't make much of a difference - and they'll actually be able to use the $20 each year... Laughing




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