From The Sun's report if 29th June, 2020:
Prosecutors claim they have traced the phone used by their prime suspect and found it connected to the mast owned by the resort complex where the McCann's were staying.
The Sun report is referring to the Australian 60 Minutes programme on Christian B.
An excerpt from that programme:
60minA: Maddie was abducted between 9 and 10pm. Prosecutor Wolter's team discovered that during that same time, a mobile phone linked to Christian Bruckner was used in the immediate area of her hotel room.
[Zable's note: Crap. The Ocean Club wasn't/isn't a hotel. Madeleine was in a room in one of the Waterside Apartments, in block 5; with an open-air car park out front, nestled in the intersection of a T-junction, with an alleyway along the rear of the block. On the other side of the alleyway was the walled off tennis courts, swimming pool, and general Tapas area where her parents were eating. ....As for the time of the phone call... Per the Met's news portal http://news.met.police.uk/news/operation-grange-update-and-appeal-403826 ...."The first number is +351 912 730 680. Extensive enquiries have led investigators to believe the suspect was using this number and received a call, starting at 7.32pm and finishing at 8.02pm on 3 May 2007. This call was received in the area of Praia da Luz." ~ DCI Mark Cranwell, Operation Grange]
Wolters: We know that the phone number which was used by our suspect on the 3rd May, 2007 was connecting to the mast which
belongs to the Ocean Club in Praia da Luz.
60minA: So what you are saying to me is that you can place Christian Bruckner at the scene?
Wolters: Yes, we think so.
Why would the mast belong to the Ocean Club does anyone know?
In 2007, the Ocean Club wasn't in the business of providing telecommunications services. Unless, it was leasing bandwidth from one or more of the national telcos for use of its staff and holidaying guests. But would it need to own a dedicated mast for that?

Or, is the OC owning/having a mast belonging to it a mistaken understanding?
Per the PJ's files, the 4 telcos from whom it obtained phone records & call traffic info, including roaming calls, in 2007 were Portugal Telecom and the 3 national mobile phone operators TMN, Vodaphone and Optimus. No mention of the records relating "to the mast belonging to the Ocean Club" that I could spot.
https://www.mccannpjfiles.co.uk/PJ/MOBILE_PHONE_ANALYSIS.htm
The records provided to the PJ had info on phone numbers, date, time, duration of calls. This was info from folk who had contracts with their service provider, ie, registered users. The PJ didn't have names of those who used pay-as-you-go phones.
These 3 national mobile phone operators would have had their own masts (with antennas) scattered around Luz, each antenna likely covering an area of several kilometres. The antennas of the different operators possibly overlapped coverage.
In those days, if without GPS, to locate the place where a cell phone was used, triangulation techniques were most often brought to bear on the pings - sorta handshakes - between the phone and antennas on the masts. ...As was more recently done to the cellphone of the co-pilot of missing flight MH370.
Whether or not that's how German regional prosecutors were able to hit pay dirt when they put Christian B's phone number into Scotland Yard's database is anyone's guess. ....Presumably, SY's database had info from the PJ's Madeleine McCaan files, such as this one:
https://www.mccannpjfiles.co.uk/PJ/DELETED_CALLS.htm 8 Excerpt from info at that link:
None of the telecom records show triangulation co-ordinates but are limited to identifying the single primary antenna on which calls were registered.
....Here's the thing though. Hundreds of people who lived in Luz used their cellphones on May 3rd, 2007. Not all for nefarious reasons. Per the Oz 60 minutes programme, Christian B lived just over a kilometre away from the (arguably sprawling) Ocean Club, which was integrated with Luz's village, ie, one part here, another part there. ....Given that, isn't it very possible that Christian B was living in an area covered by the very same antennas of one or more mobile phone operators that
also covered some or all parts of the Ocean Club Resort? That would place Christian B -- and every one else in Luz, Lagos who was living under the same coverage -- "at the scene". So, easy enough for Prosecutor Wolters to say "Yes, we think so."
Sheesh.
Someone please tell me the German prosecutors do have more incriminating "at the scene" evidence than that.
That the Ocean Club did, indeed, have its own dedicated mast with limited coverage; and that Christian B's cellphone did ping for 30 minutes on that very mast. Which it could not have done had he/his cellphone been at home or elsewhere in Luz.
All that being said, if the Ocean Club having its own mast is truth, I wonder how the antennas on the OC mast screened out or blocked out or somehow distinguished between who was on its property/premises and who wasn't? Eg, between Mrs Fenn living in her own apartment and the holidaying Tapas 9 staying in OC-leased apartments in the very same block? Or between all them in their apartments and passers-by "just yards away" outside in the public roads and alleyways?
But if the mast in question
didn't belong to the OC.... t'was a mistaken understanding....
Perhaps, the national telcos had a way of further sub-dividing antenna coverage, and in a way that showed Christian B's phone could not possibly have been at home or elsewhere. Was his phone, in fact, triangulated by one or more of their masts, and did they indeed place him in "the immediate area" of the Waterside Gardens apartments aka Maddie's "hotel room"?