Cell phone signal strength different on 2 phones?

I have a iPhone SE and recently picked up an LG Q6.
Where the iPhone at home and work would get 2-3 bars the Q6 barely gets a bar at work and keeps dropping signal and at home lucky to get 2 bars.
Even if I'm outside it's low on bars.
Is this just how it is or can this be dealt with?

Can the person who stolen my iPhone break the passcode?

My iPhone 5s as been stolen it as a passcode on and iv reported it stolen so it's been blacklisted the problem is I'm really worried about whoever as taken my phone being able to see very personal stuff on ther pics texts between me and my boyfriend is ther anyway a 4 digit pass code can be undone by any phone expert? I'm sick with worry iCloud as never been set up on phone and I don't know my Apple ID for that phone please help

Need help with new iPhone 8 plus?

Put my old prepaid sim in from other phone and can browse the internet but can't make calls or send text also can't receive them says incorrect number has been dialed

Will Apple fix my iPhone if the screen is cracked?

I have an iPhone 7 and it no longer turns on after having an issue with service. I have a small 3/4 inch crack on the top right of my screen. I want to have my phone fixed, but don't want to pay to fix the screen first. Will Apple fix my phone if it's cracked?

Apple Music on IPhone 6s

So I bought some old music that I wanted to use in a video, so I switched my Apple ID to my old account. Now it won't let me use my Apple Music even though I paid for it on my iPhone because my iPhone has been associated with another's account. It says I can't use my Apple Music for another 90 Days. Is there any way I can override that, or change it so I can use my Apple Music?