Lots of forums are full of discussion about the hot topic: iPhone 7/7 Plus/6s/6/5 call failed or iPhone 5 (Take iPhone 5 as an example) dropped calls. Many users complained that their iPhone 5 has bad call reception and the "call failed" message prompted every time when they want to make calls. The iPhone 5 call failed problem even happened during phone call conversations. It is extremely bad situation especially when we need to make a call with iPhone 5 immediately and urgently. Stay calm. Here are 8 tips for you to try to fix this issue when your iPhone 5 call failed on Vodafone, Verizon, AT&T (ATT).
For your references, you can try any of the following tips to fix or avoid this bad issue that iPhone 5 failed every time, no matter whether your device is on iOS 8, iOS 11/10/9.3/9.2/9/7.
With all the above tips to help you, you can fix the iPhone 5 call failure and avoid or limit the amount of calls which iPhone 5 drops.