recently purchased a Blackberry 7100t and people that i call have difficulty hearing me....no scratch that, cant hear me at all!!! is there a reason for this....and if so can anything be done about it?
No no, what Roughtrader stated is neccessarily true. You mic maybe fine. There have been lots of complaints about the 7100 having bad MIC volume.
I know with mine it was that way until I upgraded the OS to a higher version. check the TMO website and compare your OS on your handheld with the latest OS t-Mobile has listed and upgrade if the TMO version is higher.
You'll find a several threads about MIC volume on here and some solutions.