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How to convert a 2G sims operating device to a 4G?

I have 2 GSM 2G Sims card  listening devices which is not capable to work on 3g or 4g network.. Since cell phone companies now require a 4g sims card and the listening devices have not advance to work on the 3G or 4G network, I need to convert my device to work on a gsm/wcdma.  The problem is that I don't have an older sims card.  AT&T and T-Model are stating I have to get their 4G sims.  And I can't find a cell phone company still operating on Edge (2g ).  Can anyone help?

Here's a link to show the 2 devices:

http://www.ebay.com/itm/spy-GSM-Two-Way-Audio-Device-Sim-Ear-Bug-quad-band-/300559438536?pt=LH_DefaultDomain_0&hash=item45fabd12c8

http://www.ebay.com/itm/Power-Plug-Adapter-style-spy-gsm-bug-audio-voice-Surveillance-device-TC300-/300609991817?pt=LH_DefaultDomain_0&hash=item45fdc07489
    Thank you

frollard5 years ago
You don't have legacy connections where you are? LOTS of people still aren't on a 3g network...where are you?

Basically, no, you can't without replacing the gadget.
chamilton7562 (author)  frollard5 years ago
Located in Salem OR
...unless are you on about the new micro-sim cards? You can get adapter trays to make them physically fit older models...