iphone4 3g and wifi together?

  numskull 11:31 24 Jan 2011
Locked

Should these both be switched on or just one at a time? In the house my signal drops to one bar with 3g switched on but get four bars with 3g switched off. Outside work I get 5 bars on 3g but obviously not connected to Wifi. I've read that poor 3g signal areas will decrease battery life but also read, "What's the point of having a 3g phone if 3g is switched off!"

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