Have a2014 kia rondo and my smsung galaxy s duos phone will not charge in either the USB port or the cigarette lighter. My daughters and partners phones will.

if alternator is working correctly yes

by can't find the fuse, you mean you can't find one labeled as cigarette lighter? Or can't locate the fuses?
Visually check for a blown fuse, if none is found you have to assume that the device is broken.

Changing the fuse in the fuse box wont solve your problem On the back of the socket that is mounted in the dash that the lighter pushes into has a inline fuse that if over heated will blow. You will have to change the lighter. Toyota wanted close to $70 for a replacement lighter for my Tacoma. I never used the cigarette lighter for cigarett but needed to charge my cell phone so I replaced it with a dash Mount 12 Volt Power Socket for $10. Good luck.

It sounds like you might have drained your battery! When the car is running does the Cigarette lighter produce power? It should be working while the car is running. That would also explain why the car starts sporadically. Try leaving the car on for 40 minutes. That might charge the battery enough.

You need a wiring diagram for that component. I would chech both the engine and cabin fuse locations and check all fuses. Then check the lighter with a test light

Then you simple can not & should not attempt,
vehicle work-- with no experience

Have a repair shop resolve the issue

Your best bet is to check on eBay for an adapter - the Asians make all sorts of stuff for cars now & i'm sure there is an adapter out there suited for your purposes. P.S. It may sound silly but are you sure you are using the actual cigarette lighter socket & Not a power outlet socket that many cars are now fitted with as standard?, my phone charger fits the cigarette socket but not the power outlet?, you never know?

You likely have a blown fuse. I have heard using the cigarette lighter for charging your cell phone can blow the fuse - was told to use the charger inside the center console for charging my cell phone.

this circuit is generally unfused so the problem is either in the lighter, or the base of lighter porthole. either one is availabe at parts houses....plug you cell phone in, if it doesn't work....replace the light base (socket)....

The best way is through the cigarette lighter port (You will need to buy a jumper cable with cigarette lighter plugs on both ends)And just plug it into another cars lighter port or a jumper pack port.This will put the 12 volts through the car needed to open the truck.