Quiero conservar el número en el móvil de prepago.

I want to keep the same number on the prepaid mobile.

Breakdown of Quiero conservar el número en el móvil de prepago.

• querer: to want
• en: in
• el móvil de prepago: the prepaid mobile
• conservar el número: to keep the same number

Questions & Answers about Quiero conservar el número en el móvil de prepago.

Why is it quiero conservar and not something like quiero conservo?

After querer (to want), Spanish normally uses an infinitive for the next verb.

• quiero conservar = I want to keep / retain
• not quiero conservo

This is the same pattern as:

• Quiero comer = I want to eat
• Quiero llamar = I want to call
• Quiero cambiar de tarifa = I want to change tariff/plan

So quiero is the conjugated verb, and conservar stays in the infinitive.

Why doesn’t the sentence say yo quiero?

Because Spanish often drops subject pronouns when they are not needed.

• Quiero conservar... already clearly means I want to keep...
• The ending -o in quiero shows the subject is I

You can say yo quiero if you want extra emphasis or contrast:

• Yo quiero conservar el número, pero ella no.
  = I want to keep the number, but she doesn’t.

In a normal neutral sentence, quiero on its own is more natural.

What exactly does conservar mean here? Why not guardar or ?