biggest problem you've had with smartphone

What’s the biggest problem you've ever had with your smartphone? My Note 2 started having unknown battery drainage at first and I could not get through more than half days so I bought a replacement mpj battery which was helpful bu the problem did not end. I dropped my phone and broke the screen few days ago. I was ready to go out and buy a new phone now. Does the Note 4 a good replacement for a Note 2?

 

My friends gifted me a Samsung Galaxy S5 last month. It slipped from my hands accidentally last week and dropped on the floor. The screen has cracked and the display flickers. There's also some problem with the battery. The phone abruptly restarts many times in a day.
I can't figure out how much the repairs or new parts will cost, but as far as I know, replacing the screen is a very costly affair. I guess the only way out for me would be to buy a new phone or start using the old one back.

 

Authentication problems with my home wifi. (Some smartphones get linked, some don't.) ...

 

I had a samsung Galaxy mini 2 and it was restarting all the time. I tried installing new android but it didn't help.

 

It's not problem but it's android bug everyone have to face once a while. When i try to install any app install button in unclickkable.

 

As yours is a new phone why don't you go to the authorized service center.

 

i travel a lot so i use my charger many times in trains and buses.. anytime i am on a bus or a train and my phone is connected to the charger.. it will freeze.. i wont be able to do anything..
i dont know why that happens

 

Mine is lagging like hell. Need to be changed asap.

 

Lackluster battery life