I have been back in the USA one month & leave again for a trip to Europe.
I plan to use UM and Callback world again. I have the same UM Sim which worked well last month.

Turned on my phone today & it displays "No service" Anyone know the reason why?
I have emailed United Mobile but have not received a reply.

When I went in Mexico it got connection overnight (after a couple of hours still no signal - the morning after signal). Let the UM sim think a bit about it... you never know.

It may be a network thing. Call the number and see what message you get.

Tried calling the number - goes straight through to our UM voicemail. The phone did not ring. Still showing "No Service"
It never did this before!!!

Are you sure all the settings are correct (i.e. if ou use a triband phone, you are on the right frequency?). Sorry for this silly suggestion, but it did happen before to other people who worte on this forum.

Tried that. I haven't altered any settings. All I did when I returned from my trip was to turn it off. It has been off for one month. Worked perfectly then.

Don't know your phone model...basically in the USA um roams on either T Mobile or Cingular....it is not registering on whichever one it is set to.

Check yourmanual to manually select your roaming carrier...maybe t mobile is not registering but cingular is or vice versa.

You should borrow a friend's GSM phone (850/1900 at least) to see if the UM SIM works with it. That way you can narrow the problem down to either the SIM or the phone. Good luck.

Khalisha
Zengo Wireless

My SIM registers as usaul on Cingy here in VA. Balance works OK, too.

If another SIM works in the phone and it registers on a US network, it is not the phone.
Can you search available networks?

I guess sometimes SIM cards go bad -- maybe the are magnetized or something happens to then.

Best of luck. Annoying, not doubt.

Stan

Did you perhaps reach the automatic deactivation time on your UM SIM? I can't find it right now, but it seems to me UM requires you use the card at least once every 9 months. If you've used CBW exclusively during that time, it's possible that you haven't actually spent any of the time on the card- which would trigger deactivation per your user agreement. Just a thought.

Dave

Yes, UM requires a chargable use every 9 months. But OP said calls still go to VM though. Which he can probably still check from a land line. I would think he would have received an appropriate message if the sim has been deactivated.

I still believe the problem can be resolved with a manual selection of a roaming network....question for the OP, the last time you turned the phone on in the USA, who was the roaming partner, T Mobile or Cingular?

First thing I'd do is a manual network search to see if the phone can locate the networks.

I tried my SIM in an unlocked phone here in Florida and it worked fine - I was able to dial out and get balance. So my SIM is OK. The problem is with the phone.

However - this is not the phone I am taking to Germany. The phone I am using is the one I purchased one month ago in Italy. It worked in Greece, Turkey & UK also.

When I returned home to the USA I recall looking & seeing that I had service in Florida also (TMobile). However I am still in Florida & it is still showing "No Service". I am hoping that my phone will work fine when I arrive in Europe.
FYI - It was a cheapo phone I bought in Italy - Motorola C118. GSM 900/1800. Does the job though.

Hi. 900/1800 phones don't work in the US, as the US uses 850/1900. So, that seems to be your problem. You phone should work fine again with the UM SIM on your upcoming trip to Europe.


Khalisha

Zengo Wireless

Good then. But, I do not think that phone would have showed tmobile in the USA. It should have showed exactly that. "No service" The 900/1800 band is not used here in the US. All along, the very knowledgeable folks here kept asking you to make sure you check the band, to verify that you are using 850/1900 or do a network search. Had you mentioned the phone model, it would have been obvious right away.

Anyway, good to know you figured it out.

It of course now all makes sense now...didn't think to ask about the frequency issue because my quick read of the post was that it had worked in the past in the US...didn't remember that the OP had brought a US model with him to Italy and had to go out and buy an inexpensive Italian dual band...