Lose signal after tethering then comes back IPHONE 3g 3.1.2

Feb 22, 2010
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Posted this another forum with no luck but was told to come here:

Since 3.0 came out and had the original tethering hack I hadnt updated my phone because I didnt wanna lose the tethering option. Well today I decided to bite the bullet and updated/jailbroke and added the tethering with the FW of 3.1.2. Now the issue is..before the update the internet ran fine, sure it lagged a few times but not like the issues I have now, where after a minutes or at random intervals the phone loses all signal, disconects and says no service. Is there a way to fix this?

It now also drops my calls. Its quite annoying.

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