Poor reception. My new SE is muting , losing, dropping calls. Never had with my 4:((( when to take back and what is better?

Hi Docket31,

From what I gather, there is an issue with your iPhone SE intermittently muting and disconnecting from calls. Try taking a look at the article linked below and running through the general sound related troubleshooting tips that it provides.

Get help with hardware features on your iPhone, iPad, and iPod touch - Apple Support

First, make sure you're using the latest version of iOS. If you still have an issue after you update, find your symptom below and follow the link for help.

Acoustic-speaker/microphone/receiver

Get help with these issues:

• No sound or distorted sound from speaker
• Microphone issues
• Receiver issues
• No sound through stereo headset

Also, this article provides some additional troubleshooting tips that will resolve most issues related to making or receiving calls.

If you can't make or receive calls on your iPhone - Apple Support

Cheers.