Hey Evidence, There isn't one readily available online under the name 'AG Chrome Ultra'. The thing is, this device's an import from abroad and called by a different name/model# in its native (original manufacturer nation). AG Mobile re-branded it to 'Chrome Ultra' domestically. To find the right ROM therefore, it is necessary that you try and look up an alternative model number (alphanumeric) from the white sticker under the battery. Without this info, you may have to arrange and have it mailed to one of AG Mobile's service centers for a software re-flash (will be a paid service).