BlackBerry 7130e

I will often forward my calls from my Blackberry to a land line while in the office. Unfortunately, there is a problem with this that Verizon acknowledges and for which it does not have a fix (or an intention to fix, it seems). Here's the situation... somebody calls my Blackberry and it forwards to a land line- no problem. While on the call on my land line, somebody else calls the Blackberry. The 2nd caller gets a busy signal- no call waiting, no voice mail, etc. This happens regardless of what line I am forwarding the Blackberry to. Verizon tech support acknowledges that when a call is forwarded, while that call is in progress any additional callers will always get a busy signal.

Here's my question: If I switch carriers, will the ...
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