iPhone 6 signal issue
Hi i've recently buyed my iPhone 6 16Gb. For this i've changed my sim card into a new nano sim with Vodafone. The phone works good for two months but after it start to show zero signal and i cannot make phone call or send sms, but 3g and 4g works. Sometimes it show "no signal" and i cannot do anything. If i extract the sim card and i put it into again, sometimes the signal come back, but after 10-15 minutes i have the same problem. I'm an apple customer from more then 6 years and i'm really disappointed about this...i'm having a lot of problem with this, i'm unreachable, and probably i have to buy another phone...what can i do? is there anyone that had the same problem? thanks
iPhone 6, iOS 8.3