I can confirm: the stop sign is in the icon, so very small, but it is there. For me it is not much of an issue: I can only talk to one person at the same time. And I get the "missed call" message when called called on SIM2 after hanging up my call on SIM1.Re: Motorola XT-532
2) Maybe other XT-532 users can confirm. When calling using line 1, line 2 will be disabled. A stop sign (similar to a no smoking sign) will appear above the line 2 reception bar.
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Didn't check the data connection yet on SIM2 while calling on SIM1.