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Internet settings lapse on Motorola Pocket PCs

Posted on 2009-04-02
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Last Modified: 2013-12-05
We have a difficult Internet problem when using Motorola MC70 or MC35 Pocket PCs with GPRS and a functioning SIM card:

We can configure the settings for an Internet connection okay.

When these Pocket PCs are new the Internet connection works fine after being configured. Our GPRS application works well, communication with a server works and we can also use Internet Explorer to visit web sites.

After a few weeks, however, it seems that the connection settings lapse!!!! Our GPRS application continues to work properly, and communications with a remote server also work. However, we can no longer reach web sites.

The inability to reach web sites also really affects our GPRS application. The application has an option, namely, to check for the ability to reach a web site as a check before starting a GPRS transfer. Internet Explorer no longer functions saying that 'Page cannot be Located'.

We have tried removing all settings and reinstating them to the original values but this has no effect.

The only thing that works is to Hard Reset the computer. We want to avoid this, however, since it erodes our users' confidence in the computer and its software.

At the moment we have 4 PPC's that are in this error state.

Does this problem sound familiar to anybody? Does anybody know how I can diagnose this problem on such a computer which happens to be in this error state?

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Question by:Pirie
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6 Comments
 
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Expert Comment

by:moorhouselondon
ID: 24152346
I know nothing about this device but from your description this sounds like it could be an IP address lease issue: is the IP address used by the service provider dynamic?  Go to http://findmyip.com/ in the browser on the device to find out what that IP address is.  Does the IP stay constant until you have the problem, then a hard reset assigns a different address?
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LVL 31

Expert Comment

by:moorhouselondon
ID: 24152442
This document has some information about how to display the IP lease expiry date:

http://www.shtotem.com/UploadSoft/mc70.pdf

If your provider has not locked down these Profile settings, then have a look see which ones can be tweaked.
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Author Comment

by:Pirie
ID: 24166196
Thanks for the hint. We have concluded that the error is not due to any ISP, DNS, or Lease problem.

We are able to Ping the IP Addrress and to resolve the address of www.google.com OK. While every setting seems to be okay, Internet Explorer still fails to locate the page (after the PPC has made connection).

I get the feeling that, although we only have one WAN connection set on the PPC, the Internet Explorer cannot bind to the open connection for some reason.
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LVL 31

Expert Comment

by:moorhouselondon
ID: 24171032
No surprises that ie might be the culprit lol.  There's no proxy evident in the connection setings presumably?
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Author Comment

by:Pirie
ID: 24182780
Although the error is evident in Internet Explorer, the error also happens when accessing internet pages from other programs that try to open an external Internet page, so I think that IE is at fault here... It looks like a sort of binding problem... IE initiates the connection via GPRS, connection is made, but then IE cannot open the page....

We are using the My ISP connection set and have cleared down everything else. The My Work Network connection set does not have the Proxy option ticked or filled in.

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Accepted Solution

by:
Pirie earned 0 total points
ID: 24225471
I have compared 2 Motorola MC70 machines; one in the error state (Internet Explorer can't open a web page) and the other not (IE working normally).

Although the connection manager shows the same settings for both machines, it turns out that the MC70 that fails to connect to the internet differs from an MC70 that does by the following setting:

[HKEY_LOCAL_MACHINE\Comm\ConnMgr\Providers\{EF097F4C-DC4B-4c98-8FF6-AEF805DC0E8E}\HTTP-{ADB0B001-10B5-3F39-27C6-9742E785FCD4}]
"Type"=dword:00000000

Does not work, and

[HKEY_LOCAL_MACHINE\Comm\ConnMgr\Providers\{EF097F4C-DC4B-4c98-8FF6-AEF805DC0E8E}\HTTP-{ADB0B001-10B5-3F39-27C6-9742E785FCD4}]
"Type"=dword:00000001

Works.

I have changed the key on the machine that did not work, and that fixed the problem. And when I changed it back, the problem occured again.

Although this is a fix for now, I do not know how the setting got changed and I want to prevent it from happening rather that fixing it when it's bust (prevention is better than cure).

Additionally, I have seen that the My Work Network settings have somehow been set for these devices..... including the Proxy Server settings, although they should not have been active (because they were unchecked).

Any ideas what could be causing this situation?
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