I have been using Vodafone from 7 years and I haven’t face any issue since 7 years in signals. I get the signals everywhere of vodafone. also the internet speed is amazing. I get maximum 10-12mbps( megabits) at my home without any speed or network drop. I like their service too. but one thing is disappointing which is high price of internet plans. this company is increasing their price on every 3-4 months and become one the most expensive operator. so they should control on this. as vodafone 4g is also coming so we will also see that how much speed will it give!