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Cell providers records don't agree with extraction

New Member

In preparation for a trial, it was noticed the cell phone records did not line up with extracted data. The extraction shows calls placed at 413, 415 & 601. Calls were received at 427 & 432 and all these calls were between these two phones. The carrier's records were obtained for both phones as well. MetroPCS shows each of these calls. TracFone, however, only shows four of the calls. It is missing one of the incoming calls (427). Although that one call will not make or break the case, I would like to get ahead of this if this matter comes up in court if I am asked.

Other than an obvious answer of TracFone did not provide complete records, or did not catch that call (I am unsure how likely that is), is there a reasonable explanation for a call not appearing on those records? Any personal experience with records such as this?

Topic starter Posted : 21/04/2016 1:39 am
New Member

Is it possible the missing call that shows up on the extraction was received using a VOIP app? I've never personally seen that, and I'm not sure that it would show up as a "received call" in the extraction, but that was the first thing that came to mind….

Posted : 21/04/2016 2:34 am

The few times I came across something like this I was told by the provider that due to the sheer amount of data being recorded by the providers computers occasionally a call won't get recorded.

I don't recall ever seeing a single call not being recorded on each providers CDR's though. So if the phone shows the call was made and you have both CDR's for the target and source numbers, then I would chalk it up to the possibility that one of the providers computers simply didn't record that call. If it's important to the case, get an expert from the provider to testify to this though (or what ever reason they provide).

Posted : 26/04/2016 3:29 am
Active Member

Is there any chance that the phone was roaming on a different carrier? That might be something to look into?

Am I to understand that you received CDR's from TracFone? TracFone, being an MVNO provider, "should" only be piggy backing off another MNO provider like, Verizon, AT&T, Sprint or T-Mobile.

You mentioned MetroPCS and TracFone. Any chance that TracFone number belongs to T-Mobile? If so then you may essentially have an "In network call" and if so I would contact T-Mobile directly and ask them about your situation.

If the call came from a different provider than T-Mobile you maybe able to get a record of the call from AT&T. PM me for more details on that if it applies.

The VoIP angle could explain things as well!

Posted : 26/04/2016 5:29 am
Community Legend

As MetroPCS is a Mobile Network Operator (MNO), TracFone seems to be a Virtual Mobile Network Operator (VMNO) which 'uses' any MNO's infrastructure. The VMNO in general has
less reliable CDRs as just tenant and not owner 'running the net'.

Technically a CDR just gets logged in carriers systems if established over the 'phone' application built into the mobile (modem aka airinterface). Any App-based calls log just as IP-traffic flagged as prioritized traffic because time-critical compared to web-traffic e.g.

If you can request the full technical log of the CDRs, not just the overview. By doing this you get more accurate data of Tracking Areas (TA) of the cells and may get a hint of a technically issue by TA-crossing.

Can also be a problem of inter Radio Access Technologies (RAT) in todays mixed Heterogenous Networks (HetNets) with different mobile broadband generations (2G, 3G, 4G LTE, MacroCells, SmallCells e.g.).

If you get an answer from TracFone for the missing call pls let us know -)

Posted : 26/04/2016 8:22 am
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