If you have an iPhone 4 and are experiencing antenna or reception issues, try the troubleshooting steps for calls and connection issues.
If you are still experiencing antenna or reception issues after performing the troubleshooting steps, contact an Authorized iPhone Service Provider in your area to request a free black iPhone 4 Bumper:
- In the United States and Canada, contact AppleCare or visit an Apple Retail Store.
- Outside the United States and Canada, see the tables below.
For a list of Authorized iPhone Service Providers, see this article.