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Currently there exist many hand-held devices that support multiple network interfaces (e.g., Bluetooth, Wi-Fi). By composing different networks via such devices one can establish an infrastructure-less B3G environment and enable service provisioning across several networks. One of the key challenges for realizing this view is inter-domain routing. Indeed, given the diversity of involved network technologies and infrastructures, a flexible routing protocol that takes into account their quality properties and dynamics is an important requirement for providing an adequate user-experience. In this paper, we present a flexible quality-aware routing protocol for infrastructure-less B3G environments that enables discovery of routes with optimal bandwidth, delay or cost according to the preference of each client. The protocol is based on the Optimized Link-State Routing (OLSR) protocol and is designed to enable computation of quality-aware routes in the multi-network environments. We detail the protocol, discuss its deployment and provide experimental results.