To avoid losing audio on a call, we recommend that you avoid switching to any other application or taking PSTN calls while on a MaxMobile VoIP call. Here are cases where you might lose the audio on a phone call:
• If MaxMobile was in the background and an audio event occurred, such as an alarm, an alert, or an incoming iPhone call, when you return to the MaxMobile call, you may not hear the other party (yet the call still shows as "Connected"). Tap the Speaker / Bluetooth button (switch the call to a different audio path) to try to regain the voice stream.
While on a VoIP call, if you walk around and move between two different networks (for example, from 3G to Wi-Fi), you may lose your voice stream.
• If you plan to travel outside of your Wi-Fi range, go into your iPhone settings and disable the Wi-Fi setting before you place your call.
• While on a VoIP call, if a PSTN cell phone call comes in, you may momentarily lose the voice stream on the call while you tap Decline.