I have two smart phones; one is a Galaxy S10, the other one is an iPhone 8. I have two smartphones; one is a Galaxy S10, the other one is an iPhone 8.

I have two smart phones; one of which is a Galaxy S10, and the other one is an iPhone 8. I have two smart phones; one of which is a Galaxy S10, and the other one is an iPhone 8.

I have two smart phones; one is the Galaxy S10, the other one is an iPhone 8. I have two smart phones; one is the Galaxy S10, the other one is an iPhone 8.

I have two smart phones; one is a Galaxy S10, the other one is an iPhone 8. I have two smart phones; one is a Galaxy S10, the other one is an iPhone 8.

Because of my old phone was ablMy old phone didn't allow me to usmake video tcalk servicels, so my father bought the iPhone for me. My old phone didn't allow me to make video calls, so my father bought the iPhone for me.

I think you mean the phone *didn't* have that feature, right?

Because of my old phone was able to usehad a video tcalk service, soling feature, my father bought thean iPhone for me. Because my old phone had a video calling feature, my father bought an iPhone for me.

I'm not sure I understand the logic between your old phone and why your father bought an iPhone. You probably need to explain more to give clarity. I would assume that your old phone didn't have the feature so that's why your father bought the phone.

Because of my old phone was able to use video talk service, so my father bought the iPhone for me. Because of my old phone was able to use video talk service, so my father bought the iPhone for me.

was your old phone able to video call, or was is NOT able to video call?

Because of my old phone wasn't able to userun any video talkchat services, so my father bought the iPhone for me. Because my old phone wasn't able to run any video chat services, so my father bought the iPhone for me.

I don't really get this sentence. Was the old phone *not* able to run the services, so you bought a new phone? Saying "Because I wasn't able to use video chat services on my old phone" would also work.

With the phone, my father and my sons can have conversations with live video. With the phone, my father and my sons can have conversations with live video.

People usually specify the name of the particular app and sometimes use it as a verb. "My father and sons can Zoom/talk over Zoom." "My father and sons can FaceTime." Etc.

With the phone, my father and my sons can have conversations withon live video. With the phone, my father and my sons can have conversations on live video.

Be careful of having too many modifiers. You had 2 clauses that said "with..." It's not wrong, but as you write more, it could lead to confusion.

With theis phone, my father and my sons can have conversations with live video. (can video chat) With this phone, my father and my sons can have conversations with live video. (can video chat)

With the phone, my father and my sons can have live conversations with live video feeds. With the phone, my father and my sons can have live conversations with video feeds.

Your sentence was fine too, this just sounded a little more natural to me.

On the other hand, I shouldhave to bring the Galaxy S10 to work because of my company's rules. On the other hand, I have to bring the Galaxy S10 to work because of my company's rules.

On the other hand, I should bring thekeep a Galaxy S10 because of my company's rulepolicy. On the other hand, I keep a Galaxy S10 because of my company's policy.

Bring means you are taking the phone somewhere, so not the correct usage here. Rule still works but when it's about company rules, policy fits better.

On the other hand, I should bring the Galaxy S10 because of my company's rule. (i should use the galaxy s10 for my work) On the other hand, I should bring the Galaxy S10 because of my company's rule. (i should use the galaxy s10 for my work)

On the other hand, I shouldhave to bring the Galaxy S10 because of my company's rule (regarding/on smartphones). On the other hand, I have to bring the Galaxy S10 because of my company's rule (regarding/on smartphones).

Specifying which kind of rule might be better here.

My company's employment card iscan only possible to install the seriesbe installed ofn Galaxy Phones, so I bought it for conveniencone to use in my office. My company's employment card can only be installed on Galaxy Phones, so I bought one to use in my office.

My company's employment card is only possiable to install the series ofpurchase the Galaxy Phone series, so I bought it for my convenience in mythe office. My company's employment card is only able to purchase the Galaxy Phone series, so I bought it for my convenience in the office.

I'm assuming you buy phones with your employment card. Install usually means downloading files/programs or attaching a part.

My company's employment card is only possible to install the series ofIt's only possible to install my company's employment card on phones from the Galaxy Phoneseries, so I bought it for convenience in my office. It's only possible to install my company's employment card on phones from the Galaxy series, so I bought it for convenience in my office.

Rephrased the first clause to sound more natural.

It is a bit heavy when Iinconvenient to bring both phones, but I can use experiences(at least) I can use both iOS and Android software. It is a bit inconvenient to bring both phones, but (at least) I can use both iOS and Android software.

"It is a bit heavy" sounds odd because it means the situation is heavy. You could say "the two phones are a bit heavy to carry (with me) to the office." You could add "at least" or omit it - either version is correct.

It is a bit heavy when I bringhold both phones, but I can use experiences both iOS and Android. It is a bit heavy when I hold both phones, but I can experience both iOS and Android.

Again, bring involves taking it somewhere.

It is a bit heavy when I bring both phones, but I can useget to experiences both iOS and Android (operating systems). It is a bit heavy when I bring both phones, but I get to experience both iOS and Android (operating systems).

Specifying "operating systems" at the end is totally optional.