http://www.youtube.com/watch?v=mOsAj7chImc
Στο blog της Telstra με τίτλο "tips for great iPhone reception", αναφέρεται ότι το iPhone 4, χωρίς την χρήση επιπλέον αξεσουάρ, εγκρίθηκε προς χρήση σε περιοχές όπως το metro ωστόσο για μέγιστη απόδοση προτείνεται η χρήση μίας εξωτερικής θήκης:
The first thing to know is that the iPhone 4, without the use of accessories, is approved by Telstra for handheld use in metro and major regional coverage areas.
To help maximise coverage performance in metro and major regional areas, Telstra recommends that customers team their iPhone 4 with an approved rubberised bumper or case.
We’ve found that an approved bumper or case can also improve the consistency of data speeds when customers are using a fast network like the Telstra Next G™ network. So if frequent mobile internet is important to you, we suggest you grab a bumper or case.
Σχετικά με την διάκριση "Blue Tick":
The great news for our regional and rural customers is that an approved rubberised bumper or case can help to maximise the coverage performance of the iPhone 4. In fact, the handheld coverage performance is improved so that it is equivalent to one of our Telstra ‘Blue Tick’ devices.
We award our Blue Tick to mobiles that have the best coverage performance and recommend them to customers working or living in regional and rural coverage areas
[via appleinsider]