Abstract: The local address book of a device can be crawled for contact information, which is communicated to an address clearinghouse. The clearinghouse can indicate whether a contact is a participant in a video calling service. If so, an indication can be stored locally indicating that the contact is a participant. Later, during an audio-only call with the contact, an option to escalate the audio-only call to a video call via the video calling service can be presented.

Abstract: A user who is online at multiple devices can be invited to escalate an audio-only call to a video call. The escalation invitation is sent only to, or shown only at, the endpoint device that is involved in the audio-only call. The technologies can support public switched telephone network audio-only calls, and escalation can be performed as a seamless call transition from audio-only to video call.

Abstract: The local address book of a device can be crawled for contact information, which is communicated to an address clearinghouse. The clearinghouse can indicate whether a contact is a participant in a video calling service. If so, an indication can be stored locally indicating that the contact is a participant. Later, during an audio-only call with the contact, an option to escalate the audio-only call to a video call via the video calling service can be presented.

Abstract: The local address book of a device can be crawled for contact information, which is communicated to an address clearinghouse. The clearinghouse can indicate whether a contact is a participant in a video calling service. If so, an indication can be stored locally indicating that the contact is a participant. Later, during an audio-only call with the contact, an option to escalate the audio-only call to a video call via the video calling service can be presented.

Abstract: While a device is engaged in an audio-only call, an incoming video call can be received. Video call context information can be included as part of the incoming video call notification, and such information can include an indication that the incoming video call is in fact an escalation of the audio-only call. Based on the call context information, a variety of actions can be taken. For example, the audio-only call can be seamlessly transitioned to the video call.

Abstract: A user who is online at multiple devices can be invited to escalate an audio-only call to a video call. The escalation invitation is sent only to, or shown only at, the endpoint device that is involved in the audio-only call. The technologies can support public switched telephone network audio-only calls, and escalation can be performed as a seamless call transition from audio-only to video call.

Abstract: The local address book of a device can be crawled for contact information, which is communicated to an address clearinghouse. The clearinghouse can indicate whether a contact is a participant in a video calling service. If so, an indication can be stored locally indicating that the contact is a participant. Later, during an audio-only call with the contact, an option to escalate the audio-only call to a video call via the video calling service can be presented.

Abstract: A communication device for communicating electronic messages with a remote device is described. The device comprises a transmitter, a user interface, a processor, and a display. The transmitter sends an electronic message to the remote device, in which the electronic message comprises a message header indicating a recipient's address and a message body including textual content. The user interface generates input signals based on interaction with a user of the communication device. The processor creates the electronic message based on the input signals and provides the electronic message to the transmitter. The display provides an attribute selectable toolbar positioned between the message header and the message body. The attribute selectable toolbar provides a plurality of attributes that are capable of being applied to the textual content of the message body. For certain embodiments, an attribute indicator may be provided to represent all attributes selected by the user interface.