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IMEI locked software

11 posts in this topic

Posted

Hi

The title says it all.

I'll be writing a snippet that checks the phones IMEI with a checksum in a file/registry/other storage to see if the software is allowed to run on the device.

Has anyone else seen or heard of anything similar?

Many thanks,

Martin Malek

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Posted

yes, be aware that you need your app to be properly signed to access the IMEI on most Windows Mobile devices

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Posted

Wasn't WM5 supposed to have an unprotected Unique ID accessible somewhere?

IIRC it was added in WM5 onwards?

P

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Posted (edited)

I have tried using lineGetGeneralInfo but it returns LINEERR_OPERATIONUNAVAIL.

So I signed it with the developer cert provided in the SPV SDK (c:\Program Files\Windows CE Tools\wce500\Windows Mobile 5.0 Smartphone SDK\Tools\SDKSamplePrivDeveloper.pfx)

But that didn't work either.

Has anyone had any luck using lineGetGeneralInfo? I'd love some more input on this.

Many thanks,

Martin Malek

Edited by mrmartin
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Posted

Wasn't WM5 supposed to have an unprotected Unique ID accessible somewhere?

IIRC it was added in WM5 onwards?

P

What is this Unique ID? Is it unique to the device or just the model?

Many thanks,

Martin Malek

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Posted

The other thing to bear in mind is that people often have legitimate reasons for their IMEI changing - like a device breaks and needs exchanging

Do you really want to stop your software working under those conditions ?

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Posted

I noticed that my installation of SDKcert.cab on the device wasn't working. I re-installed it and now I get the IMEI.

Question:

Are there any free certs available that I could use for signing my application?

Many thanks,

Martin Malek

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Posted

I noticed that my installation of SDKcert.cab on the device wasn't working. I re-installed it and now I get the IMEI.

Question:

Are there any free certs available that I could use for signing my application?

Many thanks,

Martin Malek

last time I looked at it you had to pay for app signing

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Posted

The other thing to bear in mind is that people often have legitimate reasons for their IMEI changing - like a device breaks and needs exchanging

Do you really want to stop your software working under those conditions ?

The software is for evalution purposes and we want to have some control over who runs it. So we let people send us their IMEI and we return them a file containing a key based on their IMEI. The application then checks for this file at startup. I know it's not the best scheme but than again it's a demo :)

If they for some reason change their IMEI they can obtain a new key.

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Posted

last time I looked at it you had to pay for app signing

Yeah I guess so. Off to buy licenses :)

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Posted (edited)

Yeah I guess so. Off to buy licenses :)

Someone has a lot of money grinning-smiley-9522.gif

Edited by mcwarre
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