Table 1.

Selected countries, telecom companies, and their public caller tunes/ring back tunes information.

Country	Telecom Company	Caller Tune (or ring back tunes) information available on websites
Bangladesh	Airtel	“Airtel Tune is a Caller Ring Back Tone service that allows you to set a song, tone, music, funny messages or sounds as a Ring-Back Tone for your callers. You can set a Caller Tune for all your callers, while they wait for you to pick up the call” (https://www.bd.airtel.com/en/personal/vas/airtel-tune)
Ghana	Vodafone	“Entertain your callers with amazing tunez before you answer their calls. You can assign as many tunez for your callers to listen to while they wait for their calls to be answered” (https://vodafone.com.gh/personal/mobile/vas/caller-tunez/)
India	Jio	“You'd be forgiven for not having heard of Caller Tunes, this smartphone feature has yet to catch on in the UK, but internationally, Caller Tunes are booming. Caller Tunes give subscribers a more personalized mobile phone service by allowing your callers to hear a chosen song whenever they call you instead of them just hearing the standard ringing tone. This service has grown in popularity in emerging markets such as Africa, Bangladesh and particularly in India” (https://www.horusmusic.global/caller-tunes-can-help/)
Kenya	Safaricom	“You can now entertain your callers with your favorite SKIZA tune at only Ksh 1 daily for Local and International tunes … If you like your friend's SKIZA tune when you call them, you can get it by dialing 11 while the song is playing!” (https://www.safaricom.co.ke/get-more/entertainment/skiza)
Nigeria	Airtel	“Hello Tunes is the audible ringing tune that you hear between the time you make a call and the time the call is answered. With the Airtel Hello Tunes every call is a rhythm; you can now replace the standard tune with a wide variety of Tunes for your callers to enjoy. The service also allows you to select a personalized tune depending on the person calling, time of day, season, mood etc” (https://www.airtel.com.ng/vas/music/hellotunes)
Nigeria	MTN	“Callertunez allows you to change the boring “ring-ring” tone heard when people call you with a personalized tune of your choice” (https://www.mtnonline.com/play/callertunez/)
Uganda	Uganda Telecom	“Get rid of the boring ‘ring ring’ tone when people call you. Choose what people hear when they call you with UTL Caller Tunes” (https://www.utl.co.ug/personal/value-added-services/caller-tunes/)