A small review of the Sunno S650 T5388++ dual sim, focusing on its dual sim integration with windows mobile. Probably also applicable to its smaller sibling S628 T5388i, but possibly not all all applicable on competitor phone TOPS A1.
The dual sim function is reasonably nicely skinned into the phone. The dialer has 2 dial buttons. The caller history screen has an icon for each call to indicate which SIM was used, and responds well.
Once you go into deeper screens, like contact details, or contact editing, those functions have no more 'sim awareness' so calls go out via sim1. So it is difficult to dial to 'alternate' numbers for a contact with sim2. Using
VolDpad you can work around this by selecting alternative numbers with left-right from the main dialer.
The SMS messaging is also skinned, but less nicely. When you first look at the SMS messages, it is dog-slow, but does have icons before each message to indicate the SIM used. After a short while however, these disappear and the message center is fast again. I suspect the skin causes the slowness, at some point crashes, and then it works like the default windows message center again. In any case, it takes a soft-reset to get the icons (and slowness) back.
Other utilities are which SIM to use as default GPRS/EDGE connection, a program to name SIM1 and SIM2, a program to set caller forwarding for each SIM separately and a flight mode program to en/disable SIM1/SIM2/WIFI/BLUE separately.
Also important to note is that when I used a different utility to go into flight mode (SPB Mobile Shell), this 'forgot' to disable sim2. More importantly, when I next try to enable sim1 again, it did not work. It would show the signal strength, but not operate properly. Not even when I used the official clone flight mode to disable/enable again. In the end, I had to soft-reset.
So lesson is: Do not use 3rd party or even Windows default, sim enable/flight mode programs.
In fact, I wonder if some reports about unreliable sim connections is due to some program being installed that does this at windows startup. But it could also be that I am just lucky with the ROM version I have.
All in all, so far I am quite happy about the phone. I wanted to both have a double sim phone (I travel internationally frequently) and some core windows mobile utilities on me. I used to have a Touch HD and the clone cannot run a lot of the 'gadgets' and 'eye candy' program of HTC due to different graphics and sensor chips, but it functions it primary roles in a single device.
Oh, and the battery: I've used it medium intensively for 2 days now (like you would any new toy), and the battery is at 50%. Not sure if the last 49% is going to collapse suddenly on me, but with 2 days, it has already matched if not surpassed what I get out of the Touch HD battery.
If you have different experiences, I'd like to hear it, but with the exact ROM/RADIO details (like previous post) included please. And a link to the ROM, if you have it. Unfortunately, I do not have this ROM in a file, sorry.
