Zebra (Gold/Golden-breasted, Orange-breasted) Waxbill - Amandava Subflava
Adult male: bright orange from breast to undertail-coverts.
Adult female: lacks red supercilium, has pale orange undertail-coverts; rump to tail dull red.
A loud song, this isn't a particularly melodic sweet song though, usually just a collection of high pitched utterances that carry for a long way, and is surprisingly loud and piercing considering their size.
Call a short 'cheep' or 'chirp'; also has a soft metallic 'zink zink' usually given in flight.