Karbonn K9 "invalid command cell phone" Questions

invalid command The Invalid jar command is simply because you're downloading a java application not meant for your phone's version of the java software. This is corrected by simply downloading

...invalid MMI code" everytime I try to run an USSD command like asking balance due (*999#), etc? I remark also that Sim ToolKit app is not installed on my phone. It's a sky vega im-a810s known also ...

...invalid web settings". What should I do to get the access to the internet? The Nokia Slide has no WLAN hardware. See the specifications here: https://www.gsmarena.com/nokia_3600_slide-2356.php . You ...

command and reading the label under the battery is rejected by code generators online as "invalid IMEI". Am I out of luck? have you tried this site? Go to this website to get the security code: http:/