Latest Opera Mini 4 user agents:

User Agent Platform Device
Opera/9.80 (J2ME/MIDP; Opera Mini/4.4.26736/191.396; U; en) Presto/2.12.423 Version/12.16 Java ME Unknown
Opera/9.80 (MAUI Runtime; Opera Mini/4.5.33867/191.396; U; en) Presto/2.12.423 Version/12.16 MRE Unknown
Opera/9.80 (MStar; Opera Mini/4.5.33867/191.396; U; en) Presto/2.12.423 Version/12.16 Unknown Unknown
Opera/9.80 (WRE; Opera Mini/4.5.33867/191.396; U; en) Presto/2.12.423 Version/12.16 Unknown Unknown
Opera/9.80 (S40; Opera Mini/4.2.14912/28.2725; U; en) Presto/2.4.15 Version/10.00 Unknown Unknown
Opera/9.80 (SpreadTrum; Opera Mini/4.4.34911/191.396; U; pt) Presto/2.12.423 Version/12.16 Unknown Unknown
Opera/9.80 (SpreadTrum; Opera Mini/4.4.34868/191.396; U; pt) Presto/2.12.423 Version/12.16 Unknown Unknown
Opera/9.80 (SpreadTrum; Opera Mini/4.4.34860/191.396; U; pt) Presto/2.12.423 Version/12.16 Unknown Unknown
Opera/9.80 (SpreadTrum; Opera Mini/4.4.34080/191.396; U; pt) Presto/2.12.423 Version/12.16 Unknown Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.396; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.385; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.379; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.376; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.370; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.361; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.359; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.356; U; en) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.355; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.347; U; pt) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown
Opera/9.80 (MTK; Opera Mini/4.4.31381/191.347; U; en) Presto/2.12.423 Version/12.16 MTK / Nucleus Unknown