Softbank has a not so well known line of prepaid phones. Data as well as voice service is available for prepaid phones. Previously softbank marketed this service under different names but currently it is called プリモバイル (PURIMOBAIRU)
Here is a list of a few repairs that we can do for most softbank prepaid phones:
LCD screen / broken sim socket – sd socket / micro usb plug / power jack / broken hinge / touch panel digitizer.
And a list of softbank prepaid phones (even if your model is not on the list we can probably repair it).
3G models: 705Px , 707SCII , 822P , 730SC , 821SC , 740SC , 731SC , 840SC , X04HT , X02T , 002P , 003Z , 009Z , 008Z , 001SC, 105SH , 301Z , 202SH
Smartphones: Lumix 101P , Pantone 107SH , Stream 201HP , 102P , Medias CH 101N , Aquos Hybrid 101SH , Aquos Hybrid 007SH , Dell Streak 001DL , Aquos 102SHII , Aquos Phone the premium 009SH , Blade Q+
Disney Mobile: DM011SH , DM012SH