I have thinking of changing to sprint cell phone lately but worry that the phone will not work when Im up north. Mostly around iron and vilas county. I had their service over 10 years ago and it always shut down around tomahawk. Is this still the case or have they improved? I currently have verizon and my phone works for most part with a weak to middle strenght signal. Would like to save some money by switching but wont do it if sprint is still dead up there. Thanks for any info.