I continue to be impressed with the Nokia E73 Mode. I especially like the form factor, keyboard and quality construction.
The E73 is a variant of the E72 made for and branded by T-Mobile USA. It comes with support for the operator's unusual 1700/2100 3G frequencies and also has a rather nice feature which T-Mobile calls "WiFi Calling" or "Unlicensed Mobile Access" (UMA) which lets you make and receive calls and texts using WiFi. UMA is not the same as SIP or VOIP, calls and messages made with UMA are charged against your included plan minutes, text bundle or prepaid balance. Where UMA is most useful is in keeping you connected connected when you are in an area with poor or no cellular service.
While UMA is a good thing it does require some extra setup steps if you want to be able to use WiFi data for browsing and with data aware apps. The setup is not complicated but it does not seem to be very well documented and the out of the phone's out of box default settings are not optimal.
I initially ran into several issues trying to use WiFi data on the E73:
It took a couple of days but I was eventually able to find solutions or work arounds to most of these issues.
Getting rid of the "J007 Error, "Incorrect Security Certificate" was easy. All I had to do was upgrade to the latest latest firmware (currently 0.43.001).
Getting the E73 to automatically switch to WiFi for data should also have been easy thanks to Symbian 3rd Ed, FP2's new "Destinations" feature. A Destination is a group on cellular and WiFi access points arranged by priority order. When the browser or another app attempts to connect it goes through the access points of the default Destination in priority order until it finds one that is active. On most 3rd ed, FP2 phones there is a default "Internet" destination that initially contains your only operator's packet data access point. When you connect to a WiFi HotSpot, the phone automatically adds that access point to the Internet destination and sets its priority higher than the operator access point. That way the phone will use WiFi if a previously used hotspot is available and fall back to operator data if it isn't.
But the E73 oesn't work that way. The Internet destination contains the T-Mobile packet data access point as expected, but WiFi access points get automatically added to a "GAN" destination. GAN (Generic Access Network) is synonymous for UMA. Because the WiFi and operator access points are in different destinations apps can't switch automatically between them.
Fixing that was a little tricky . The first thing I tried was adding my frequently used WiFi access points to the Internet destination. That seemed to work at first but as soon as I moved out of range of WiFi the phone became very sluggish. I could make calls but was unable to switch to or kill any running apps. When I did a long press on the Home key I saw a mysterious system process called ShareCommServer running that I couldn't kill either. The only way I could recover was to power cycle the phone. Through trial and error I figured out that if any app tried to make a connection outside of WiFi range the phone would hang. Apparently the apps were trying to use the non existent WiFi connection and the OS was blocking on the connection request!
The solution was to remove all WiFi access points from the Internet destination and add T-Mobile's packet data access point to the GAN destination. Here are step by step instructions:
Pages: 1 2
posted by Dennis Bournique
September 2, 2010 @ 7:51 pm
7 View Comments
