Monthly Archives: February 2013

Muscle vs Fat

I’m trying to stick to one 2013 new years resolution: get in shape again. The SleekGeek community and SleekGeek REBOOT diet has been a huge help.

The Stellenbosch Virgin Active has a pretty cool BIA machine which sends you PDF reports with your progress.

These two reports are 24 days apart.

Day 1:


Day 24:


It seems I lost 4.9kg of fat and gained 3kg of muscle, resulting in a 5% drop in body fat%.

Notice the total weight does not change much. Without data like this (estimating fat and muscle mass) it would be easy to feel a bit discouraged – only looking at total mass on a scale, but I’m pretty happy with the results.

Yes, BIA is not super accurate (+-4%) – but I have 7 reports along the way which all point at the same trend.

I’m simply going to gym 4 morning a week and doing 30min of cardio (with HRM) on school run days (about twice a week).

Nice toy. Thanks VA.

ps. Also notice that BMI is BS number.

What if the Emperor had no Spectrum?

Just pick up the phone…?


I’ve been more than a bit annoyed at how Vodacom’s network quality has degraded in the last few weeks. The last few months have been pretty bad, but the last few weeks have been painful. Dropped calls, calls taking forever to connect, periods of silence and noise in the call, iMessages sent as SMS after a few retries. You get the idea.

Their Twitter support people have been giving me answers like: “As per the feedback in the SR logged to Networks, our Network Engineers are still busy with upgrades in your area.” (in office hours? for a whole week? WTF?) or “our Network team will contact you as soon as any updates is available.” (yes, that was a cut and paste). Muppets.

What I find frustrating is that they seem to be very happy for me to keep paying for a degraded service and not even notifying me that their service is going to be degraded for weeks.

Scope of the problem

So, I start asking around… Charl: “MTN as well… Stellenbosch has a massive reception issue.” Dave: “Been to JHB of late Joe? There were times I had to drive to find a Vodacom signal so Maps could update and tell me where I was supposed to be going. We’ve got spoilt with near ubiquitous coverage I suppose.” Ben: “Have you had the unfortunate experience of working in Technopark? This morning a developer had to phone back 4 times before we could complete a 2 minute conversation. You might as well use empty cans and really long pieces of string.”

Seems it’s not just me. Ask any of your friends if they think their service has improved in the last 6 months?


What if the Emperor had no Spectrum?

What if we’ve all believed that GSM networks “just work” – and we were wrong? What if people built businesses on the assumption that GSM networks will always be up and offer good quality service. Car tracking, payment systems, emergency services, mobile health.

It’s a nice warm bubble and we’ve been very lucky with good service over the last few years, but one has to ponder the scenario where it becomes way less dependable.


  • Smartphones – The perfect storm, “Cisco’s Visual Network Index anticipates mobile data traffic to increase 39 times globally between 2009 and 2014.” — Mobile Data Demand by the Numbers. “The projected 2012 to 2017 global mobile data traffic increase represents a compound annual growth rate of 66 percent.” — Cisco
  • Cost and Load. The cheaper the service gets the more load on the network. We’ve been seeing and extended price war for the last year – on voice and data. Vodacom slashes prepaid call rates.
  • Should ICASA not be regulating the quality of our service? “Ah HA HA HA HA HA! No, unlike almost every single other country in the world, including most in Africa, Icasa does not independently measure cellphone quality, it relies on the MNOs to self-report. What could POSSIBLY go wrong?” — Roger
  • Will LTE save us? Sure, they are busy re-farming spectrum for LTE. More efficient for data – once more than 100 people have working LTE devices, but it’s not helping with voice call load. In the short term this LTE “upgrade” might be a big part of my problem. Refarming spectrum is compromising voice networks.
  • More spectrum? I have a feeling the process of refarming spectrum for LTE is a way of forcing government to give the existing MNOs more spectrum. Could work. Could take a long time and we’ll be stuck with poor service. It’s government, who knows?


What now?

Make sure your business model does not depend on good quality GSM network services.

Invest in Wifi. About 70% of Smartphone data traffic already travels via WiFi and not mobile

..and in my case, get more annoyed for a week or so while waiting for Vodacom to give me any form of sensible answer to my complaints.. then make peace with the idea that things are not going to get any better soon.

Now you know.



  • After some research, as suspected, Vodacom is using voice spectrum for LTE – voice spectrum which was probably already pretty congested and needed. This is the root cause of my pain – AND they have been unable (?) to tell me this in the weeks I’ve been asking them to sort out the quality of my calls. I think you’ll agree this is pretty evil.
  • GSM Signal maps: and
  • “telcos are billing companies with a small network attached” — JP
  • Hiding the truth from SA consumers.
  • Fellow Vodacom customers – I personally think you should be mad as hell and start complaining in every public forum you can.
  • Let’s try and picture the conversation between Vodacom Marketing and Vodacom Networks…
    Marketing: We need to be first to launch LTE.
    Networks: We don't have enough spectrum.
    Marketing: We need to support the iPhone5 and my ten friends who have them.
    Networks: We'll be FIRST to piss off most of our customers by neglecting basic voice services.
    Marketing: Have you seen my new iPhone5?
  • Vodacom increases pre-paid data bundle price with 335%. – Might be that Vodacom and MTN are a bit screwed with the current spectrum allocations. CellC and 8ta have much better spectrum for data services.
  • The solution… seems to be to move to Cell C, oh and pay less, let’s ponder that for a second. Now there’s the legal question – must a customer still pay to get out of a contract when Vodacom make a decision to degrade the service? (excluding hardware costs obviously)
  • Btw. The @Vodacom Twitter account person/people did ask for my number two days before I published this post. Before I wrote this I reminded them to please phone me. No phone call yet. Case study in failure.
  • Seems Vodacom is still best for avg signal strength, but Cell C is in a healthy 2nd position overall and probably on par for urban areas.

Quick Update


  • Monday, dropped Mia at school – early, cardio at Waterstone VA, weights at Stellenbosch VA with Werner – first real gym day in a while, upgraded to WP 3.5.1 with Twenty Twelve theme, fetched Mia from Judo class – looks like good fun, watched Indiana Jones and the Last Crusade.
  • Charged 16 devices, phones, iPods, iPads, leappad.
  • Tuesday, dropped Mia at school, cardio at Waterstone, weights at Stb with Werner, haircut at Lize’s, lunch with Dirk at Green Gate, server migrations, swim and braai at Maia’s house.
  • Having Mia in Gr1 involves a fair bit more planning and organising.
  • Wednesday, school run, gym, Tech Report TV interview at Mill Coffee House, lunch with Werner and Mark, Cape Town investor meeting.
  • “T-Rex sore, or just stiff?” — Werner, about gym.

  • “To those dead souls inching along the freeways in their metal coffins, we show them that the human spirit is still alive.” — Point Break

  • Living dangerously: “Pure adrenalin, right?! The ultimate rush. Other guys snort for it, jab a vein for it — all you gotta do is jump.” — Point Break

  • Thursday, school run, gym, gym with Werner, meeting with Jan and Alex at Hazz, server migrations, watched a Vensters show with Mia, supper with Petr and Piet.
  • Friday, school run, agreed on a term sheet for Gust’s next round of funding, gym, Cape Town day, meeting with Elan (Mr SleekGeek) at Neo, renewed my car license – not as painful as I bargained for, car wash + raw power salad at Wellness Wharehouse (watching the models), fetched Dr. Ernst from the airport, Stellenbosch Wine Festival with Paul, Moreson Premium Chardonnay at home.
  • “He who has a ‘why’ to live, can bear with almost any ‘how’.” – Friedrich Nietzsche (1844-1900)

  • Mia has figured out how to send photos via iMessage – her mom’s phone must be using a fair bit more data – so if you start getting photos from my number – you know who it was.
  • “You dodged a bullet there.” — Ernst, about relationships.

  • Saturday, Mia and I planted watermelon seeds in some potting soil, lunch at Babel – Babylonstoren – very good, dropped Mia at Roxy’s birthday party, drove to Greyton, Origin sunset session.
  • Sunday, Origin, swim, Campari and Croquet with Ernst in Greyton.
  • “Silo of health.” – Ernst, about mothers (you want to have children with).

  • How’s the health thing going? I pretty much undid the damage from 2012 – so far. 88.5Kg, ~19% body fat and I fit in a pair of jeans from 2004 again. If I trust the BIA machine I gained at least 1.5Kg muscle and lost 3Kg fat in January.

Have a fun week, crazy kids.