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Here is fresh usability test/field observation.

I was in the room of concrete building and I needed to make a call. OK, I took my Jolla out of the pocket and ran phone app. I found a contact and tap "call" control. Nothing happened. Once again and again... What, my Jolla freezes? Do not know how many time one could spend on that efforts, I was rescued but some passerby who gave me a hint.

As you may guess already the was no carrier in that room. But Jolla gave no clue about that. Moreover Jolla allowed me to try to perform action that was not available at the moment.

Please note: this not about fullscreen app or about statusbar. Such things should be more sophisticated than just permanent icon.

Suggestion:

1. The mobile carrier unavailability should be indicated clearly at least when phone app is active.
2. Controls of immediate actions (such as make a call) should be not active unless corresponding action is not possible. System must inform users clearly why they are unavailable.

Here is fresh usability test/field observation.

I was in the room of concrete building and I needed to make a call. OK, I took my Jolla out of the pocket and ran phone app. I found a contact and tap "call" control. Nothing happened. Once again and again... What, my Jolla freezes? Do not know how many time one could spend on that efforts, I was rescued but some passerby who gave me a hint.

As you may guess already the was no carrier in that room. But Jolla gave no clue about that.

Moreover Jolla allowed me to try to perform action that was not available at the moment.

Please note: this not about fullscreen app or about statusbar. Such things should be more sophisticated than just permanent icon.

Suggestion:

1. The mobile carrier unavailability should be indicated clearly at least when phone app is active.
2. Controls of immediate actions (such as make a call) should be not active unless corresponding action is not possible. System must inform users clearly why they are unavailable.

Here is fresh usability test/field observation.

I was in the room of concrete building and I needed to make a call. OK, I took my Jolla out of the pocket and ran phone app. I found a contact and tap "call" control. Nothing happened. Once again and again... What, my Jolla freezes? Do not know how many time one could spend on that efforts, I was rescued but some passerby who gave me a hint.

As you may guess already the was no carrier in that room. But Jolla gave no clue about that.

Moreover Jolla allowed me to try to perform action that was not available at the moment.

Please note: this not about fullscreen app or about statusbar. Such things should be more sophisticated than just permanent icon.

Suggestion:

1. The mobile carrier unavailability should be indicated clearly at least when phone app is active.
2. Controls of immediate actions (such as make a call) should be not active unless corresponding action is not possible. System must inform users clearly why they are unavailable.

Here is fresh usability test/field observation.

I was in the room of concrete building and I needed to make a call. OK, I took my Jolla out of the pocket and ran phone app. I found a contact and tap "call" control. Nothing happened. Once again and again... What, my Jolla freezes? Do not know how many time one could spend on that efforts, I was rescued but some passerby who gave me a hint.

As you may guess already the was no carrier in that room. But Jolla gave no clue about that.

Moreover Jolla allowed me to try to perform action that was not available at the moment.

Please note: this not about fullscreen app or about statusbar. Such things should be more sophisticated than just permanent icon.

Suggestion:

1. The mobile carrier unavailability should be indicated clearly at least when phone app is active.
2. Controls of immediate actions (such as make a call) should be not active unless corresponding action is not possible. System must inform users clearly why they are unavailable.