I've been successfully, and happily, using giffgaff on my old Nokia 1208 handset for the last two years or so, with no problems whatsoever. All of a sudden, in the last couple of weeks, I began having trouble with the connection. I just could not make outgoing calls, nor receive calls from any network (including giffgaff). May I add here that I didn't remove the sim, or swap phones, or anything of that sort. I got in touch with an agent on giffgaff, and after a series of unsuccessful steps - switching off, removing battery, swapping to an alternative unlocked phone, etc. - I was sent a replacement sim. After this new sim got activated, I have begun having the exact same problem. I even tried hard-resetting the handset and reconnecting to giffgaff, but although the network and signal are fine, I am still unable to make or receive calls. I have now been asked to post this on these forums by the agent to see whether anyone out there has faced a similar problem, and how they managed to resolve it.
I have tried swapping to other older unlocked handsets - Samsung SGH-C120, Samsung E2100B and a Samsung SGH-J700i, but have the exact same problem. I have also tried checking with Vodafone, Orange and O2 sim cards and they all work on each of these older models.Only giffgaff doesn't!
My daughter (also on giffgaff) has the exact same problem. She is being sent a replacement sim now, but I doubt it is going to solve the problem. I read somewhere that giffgaff sim cards sometimes stop working in older handsets. Is this true? And if that is the case, how was it working these past couple of years, and what could suddenly have caused this issue, with no meddling with the simcard on my part?
Also, I get a "busy network" message when calling others (including landline numbers), and when others call me, they get the 'voicemail' message straightaway with no ringing. I've also checked the O2 link for service disruptions, but all seems fine.
Sorry for this rather longish post, but wanted to put down all the details in one go. Hope someone out there can help.