אם איכות הקול בשיחה לא טובה, אעבור למכשיר אחר.

A rough transliteration is:

Im eikhut ha-kol ba-sikha lo tova, e'evor le-makhshir akher.

A natural English-friendly pronunciation guide would be something like:

im ey-KHOOT ha-KOL ba-see-KHA lo TO-va, eh-eh-VOR le-makh-SHEER a-KHER

A few notes:

• ח in שיחה and אחר is a throaty sound with no exact English equivalent.
• קול can mean voice or sound, and here it means sound/audio.

Here, אם means if.

So the sentence has a standard Hebrew conditional structure:

אם ... , ... = If ..., ...

Important extra note:

• אם can also mean whether in other sentences, depending on context.
• Here it is clearly if because it introduces a condition.

Because Hebrew often expresses X of Y with a construct chain (called סמיכות).

So:

• איכות = quality
• הקול = the sound / the voice

Together:

• איכות הקול = the quality of the sound
• More naturally in English: the sound quality

This is the normal Hebrew way to say that kind of phrase.

Because in a construct chain, the first noun usually does not take the article.

So:

• not האיכות הקול
• but איכות הקול

The definiteness comes from the second word:

• הקול = the sound
• therefore איכות הקול = the quality of the sound = the sound quality

So even without ה on איכות, the whole phrase is definite.

בשיחה comes from ב־ + שיחה.

That gives meanings like:

• in the conversation
• during the call
• on the call

In modern Hebrew, שיחה often means a phone call as well as a conversation, so in this sentence it most likely refers to the call/conversation context.

A useful spelling note:

• בשיחה can look the same whether it means in a conversation or in the conversation, because Hebrew spelling often does not show that distinction clearly without vowel marks.
• Context tells you what is meant.

Because טובה agrees with איכות, and איכות is a feminine singular noun.

So:

• איכות = feminine singular
• therefore the adjective must also be feminine singular:
  • טובה = good (feminine singular)

Not:

• טוב = good (masculine singular)

This kind of adjective agreement is very important in Hebrew.

Good question. In Hebrew, many feminine nouns do end in ־ה or ־ת, but not all of them.

איכות is simply a feminine noun that you learn as part of the word. Its adjective agreement shows that clearly:

• איכות טובה = good quality

So although the ending is not the most obvious one for English speakers, it still behaves as feminine.

Because Hebrew normally does not use a present-tense form of "to be" in sentences like this.

So Hebrew says, literally:

• איכות הקול בשיחה לא טובה
• The sound quality in the call not good

But in natural English we translate it as:

• The sound quality in the call is not good

This is completely normal Hebrew grammar.

Yes. That would also be grammatical.

The difference is roughly this:

• אם איכות הקול בשיחה לא טובה...

  • sounds natural for a present or immediate condition
  • if the sound quality isn’t good...

• אם איכות הקול בשיחה לא תהיה טובה...

  • makes the future idea more explicit
  • if the sound quality won’t be good / is not going to be good...

In everyday speech, the version in your sentence is very natural.

אעבור is the 1st person singular future form of לעבור.

Basic meaning of לעבור:

• to pass
• to move over
• to transfer
• to switch

In this sentence, the meaning is:

• I’ll switch / I’ll move over

So:

• אעבור למכשיר אחר = I’ll switch to another device

This is a very natural use of לעבור in Hebrew.

Because Hebrew usually leaves out subject pronouns when the verb already shows the person.

אעבור already means:

• I will switch

So adding אני is usually unnecessary.

You could say:

• אני אעבור למכשיר אחר

But that often sounds more emphatic, like:

• I’ll switch to another device

Without אני, the sentence is more neutral and natural.

It means:

• ל־ = to
• מכשיר = device
• אחר = other / another

So:

• למכשיר אחר = to another device

In context, מכשיר could mean:

• another phone
• another device
• another handset

depending on the situation.

Because מכשיר is a masculine singular noun.

So the adjective must match it:

• מכשיר אחר = another device
• not מכשיר אחרת

Compare:

• מכונית אחרת = another car
  because מכונית is feminine

So this is another case of adjective agreement.

Yes, to some extent.

The sentence as written:

אם איכות הקול בשיחה לא טובה, אעבור למכשיר אחר.

is very natural because Hebrew often puts the if-clause first.

You could also say:

אעבור למכשיר אחר אם איכות הקול בשיחה לא טובה.

That is also understandable and grammatical.

The original version is just a very standard, neutral way to say it. The comma after the first clause is also normal when the conditional clause comes first.