said by PCJunkies :

By default, will the phones always us WiFi if available?

Or does it go by signal strength.

Scenario -
Outside Starbucks in parking lot you get 4 bars strength for Wifi but there is a nearby cell tower that gives you 5 bars. How does the phone handle that?

said by cbrain :

Drops were not my problem. At times, both phones worked on cellular but failed to connect to an available Wifi network. If I looked at the "available networks" sub menu, I could see the network and strength. It would not only fail to automatically connect but if I tried to manually "connect," it would fail and give an error code. Once it fell into this mode, I would need to re-boot the phone at a minimum, and that often did not fix it. This tested at home, office, private networks and Starbucks. In this mode, it would fail on all the above networks until reset. I'm very happy your old SIM works, and don't know why it seemed to cause a problem for me. T-mobile techs suggested this as a solution and it seems to have worked for both handsets.

I want to let anyone that may experience the same problem know it is not a problem you should accept.

said by maartsen :

Yes - I am using the Nokia 6086 and Phonelabs' Dock-N-Talk with Bluetooth module, my two line Panasonic cordless PABX has one line plugged into the Dock-N-Talk and I get caller ID, and can dial. Quality is reasonable (no cable available for this Nokia).

said by burgerwars :

It would be nice if t-Mobile offered the service on their pay-as-you-go plan. t-Mobile is my backup phone. ...

said by montee4 :

I am having the opposite problem where when I am on a WiFi call it doesn't switch to the GSM Network when I walk out of range of the Wireless Router, it just drops the call.

said by cbrain :

Check your "menu - settings - Wi-Fi - saved networks - highlight chosen connection - options - edit details - Wireless router handovers" and make sure it is set to Yes.

said by CommSoft8086 :

Bzzt! Wrong. The 'Wireless Router Handovers' setting is for AP to AP handoffs, where the APs have the same SSID and same security settings (and are on the same network with the same DHCP server, etc.)

The previous poster may be having handoff problems due to the lack of indoor GSM coverage in his area. If the phone has not oriented itself on T-Mobile's public network (by registering and obtaining the MCC-MNC-LAC), a UMA->GSM handoff will not work

said by cbrain :

OK. Sounds impressive. Should this setting be on or off where there is a single wireless access point and a weak to moderate GSM signal?

Since getting this service, 1 to 3 times a week my phone won't connect to any WiFi connection. The phone sees a strong connection but won't auto connect and I get a 1006 error when I attempt a manual connection. The phone will not connect to any WiFi network, even another location, until I remove the battery and reset my phone. I tried both a new phone and simm without improvement. All T-Mobile techs, advanced whatevers and engineers don't have a clue as to what is causing this or how to fix it.

Any ideas? Could this setting make a difference?

said by JOEZEP21 :

I just got the T-mobile Curve and no joy here. I cant place or receive Wi-Fi calls. The funny thing is when I place the call it initially connects for the first 5 seconds. Then it abruptly drops the call and displays a "call failed" error message. I can send & receive messages no problem. (Im on a BES Server) I can also browse the web no problem, just cant send/receive calls that last longer than 5 seconds! I did some additional testing to see if band selection might be a solution. Unfortunately still no results. I tried each of the following modes on my router:
802.11 b
802.11 g
802.11 Mixed Mode
Each mode exhibits the same behavior. It initially connects for about 5 seconds and then drops the call with a "call failed" error. Im realying this info to our T-mobile corporate rep who is usually pretty good source of info. I'll post back when a solution is in hand.