Download Android Jelly Bean stock firmware for Ulefone U58 Smartphone from here, here or here. This should work also with E-ceros One smartphone.
Archive name: ulefone_u58.zip
Archive file size: 241 MB
Support: Mediatek MT6592
OS: Android Jelly Bean 4.1.2
Build: s890_jb-eng 4.1.2 JZO54K 18 test-keys
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