Samsung 3 Tethering inferior to Samsung 2 Tethering

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http://androidforums.com – I use two phones for tethering. Samsung 2 and Samsung 3 on TMobile. Samsung 3 tends to drop tether and have poor connection and I have no problem with the Samsung 2 in same conditions. Both are used in same location and time. Samsung 3 is second Samsung 3 I've owned. Had problems with both. Is this a hardware or operating system problem. And is there a solution to getting the Samsung 3 to operate properly like my Samsung 2? (General)