given cdma phones cannot turn off 3g without losing voice, real problem many (especially on sprint) when in low signal area. in marginal area weekend, , roaming on verizon no problems. got closer sprint signal, see switch in networks no bars. couldn't text, or use data @ until sprint signal dropped , returned roaming. major problem see battery dropping precipitously when in marginal area. phone keeps searching home network , burns lot of battery doing it. hack on old pre allowed toggle "roam only" worked wonderfully problem , conserved significant amount of battery life. given closed ios system, imagine never made available natively. available when jailbroken? keep having people "just turn off roaming data" misses point entirely. want data, don't want phone searching native signal.
as say, ios closed system , apple favours carriers when making feature decisions (and allows them disable features "carrier settings" file).
unlikely they'd ever put in such toggle themselves.
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