There's a French brand called Wiko which floods the market with dual SIM Android phones that are said to be of pretty good quality.
As an entry-level smartphone I like the
Wiko Rainbow, which is currently sold
for some € 150 at conrad.de (or from
eBay.de).
CPU: Mediatek MT6582 Quadcore 1.3GHz
GPU: Mali 400
internal storage: 4GB
microSD slot: up to 32GB
RAM: 1GB
display: 5″, 1280x720px
networks: GSM 850/900/1800/1900, UMTS900/1900/2100
camera (front/back): 2MP / 8MP + LED flash
battery: 2000mAh (changeable)
dimensions: 146 x 74 x 9,3 mm
weight: 167g (inkl. Akku)
extras: dual SIM, USB OTG
No GLONASS or 5GHz wifi.
Rumour has it that Mediatek might release the source code of their chipset drivers into the public domain which would mean that Mediatek-powered phones such as Zopos and the Wiko Rainbow could receive an update to Android 4.4 (Kit Kat) in a few weeks to months.
However I just noticed some very interesting advantages of the Moto G dual SIM (XT1033) which perhaps justify the € 50 difference from the Wiko Rainbow:
+ GLONASS support
+ pentaband UMTS (850/900/1700/1900/2100 MHz)
+ Android 4.4 (Kit Kat)