Mywi
I think its mywi. After getting past the rediculous price its acually got the easiest and greatest interface. But if your on sprint or att i reco end you stay away from tetherme and mywi and just go with pda net to hide data usage. If your on verizon all of them should work fine. Im on verizon and i just use mywi 🙂
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Im sorry i forgot to tell you there is 2 apps that tether in the appstore. They are both 3 dollars so ill just tell you one. Search rock paper scissors hidden tethering app intje appstore on google or youtube. I have a video made by me (Daniel Levi) on how to use it. If you care about tethering cheap without a jailbreak i recomend you get it fast 🙂