Here's an example of OP's 0020 usage which I have a problem correlating with the evidence.
The facts
His cousin states in his witness statement given on 18 Feb 2013 that “at around 20:10” he and OP “exchanged various messages on ... WhatsApp”, that OP called him “at 20:25” and the call ended “at approximately 20:45”.
OP states in his EIC that “At a point I was texting my Cousin back and forth and I thought maybe I should just phone him and I called him.”
He confirms this to Nel in cross examination, stating "I was surfing on my iPad, my lady, umm, and more or less at the same time I was busy texting my cousin, err, Mr Binge, and later in the evening, whilst I was still on the bed I made a phone call to Mr Binge".
In his EIC he also talks about changing position on the bed between texting and phoning (although this seems to state a different sequence, with the call being earlier). "Umm, whilst him and I were on the phone I, I was lying down on the bed, umm, earlier in the evening ... but whilst I texted him I s..., I laid down, err, at the foot of the bed."
The 0020 phone usage shows the following:
18:47:40 - 18:48:57 GPRS connection (77 secs)
18:47:59 - 18:48:36 Call to Carl (36 secs)
20:24:49 - 20:54:04 GPRS connection (1,755 secs)
20:25:07 - 20:54:04 Call to cousin (1,737)
The call times and durations are 100% accurate, the GPRS times and durations are derived from the phone usage chart. There is no activity on the phone between 18:48:36 and 20:24:49.
The problem
There is no GPRS connection covering the WhatsApp 'conversation' from about 20:10 to 20:25. Even allowing for the GPRS connection ending exactly when the call ends (which is unlikely) there is only an 18 second overlap. And even if I have misread the GPRS connection time and it reads 1,799 seconds, that's still only a maximum of 62 seconds for the text conversation back and forth whilst OP surfs the net (I don't think I have misread it, it definitely starts after 20:20 and it's curious that is aligns so well with the call duration).
He can't be using Reeva's phone because he says she's using it (and it's unlikely that he'd have a WhatsApp conversation with his cousin using someone else's WhatsApp id).
He can't be using his 4949 phone as it's off the air and has no GPRS connections during this period (and is in the kitchen in my opinion). This would also have to be a different WhatsApp id as one WhatsApp id can only be registered to one device.
He can't be using his iPad because WhatsApp doesn't run on the iPad (actually, it can be made to but I believe it would be beyond OP to figure how to do this as it's not straight forward).