It looks like the cell system in Aruba is well advanced (it is actually better than what I have here in Southern IL)
There are 2 providers but Digicel is the biggest and the more advanced. Digicel has at least 15 towers on the island which covers 90% of the island and then some (even for some distance out in the water) - The company may have their own towers or they may share towers with Digicel. So between both companies there may be more than 15 towers on the island.
LE no doubt will be able to pin point which towers picked up Jorans calls and Text messages - The text message will be easy to retrieve from the cell company.
I am still trying to find a cell tower location map. Hopefully I will run across one during my hunt.
Joran could send a text message from his phone to Deepaks email account if he had the best Digicel service package.
If he was nowhere near the HI, I would love to know where he was! Maybe where he put Natalee......
Are you certain this is the phone system they used?