Tulifikiri bando limeisha, kumbe modemu ilikuwa imezimwa tu.

Tulifikiri = tu-li-fikiri

• tu- = we
• -li- = past tense marker
• fikiri = think

So Tulifikiri means we thought.

The dictionary form is kufikiri = to think.

In everyday East African Swahili, bando usually means a data bundle, internet bundle, or mobile data package.

So bando limeisha means the data bundle has been used up or has run out.

This is a very common modern, informal word, especially in conversations about phones, internet, and airtime.

Because the verb has to agree with the noun class of bando.

limeisha = li-me-isha

• li- = subject agreement for this noun class
• -me- = perfect tense, often like has
• -isha here comes from kuisha = to finish / be finished / run out

So bando limeisha means the bundle has finished or more naturally the bundle has run out.

A common learner question is why it is not just some general form like imeisha. In Swahili, the verb usually agrees with the noun class of the subject, so bando triggers li- here.

Kumbe is very useful in Swahili. Here it means something like:

• but actually
• as it turns out
• it turned out that
• only to discover that

It often introduces a surprising correction to what someone previously thought.

So in this sentence:

• Tulifikiri bando limeisha = We thought the data bundle had run out
• kumbe modemu ilikuwa imezimwa tu = but actually the modem was just switched off

So kumbe is not just a plain but. It specifically adds the idea of unexpected reality.

Because modemu belongs to a different noun class from bando, and that class takes i- for subject agreement.

So:

• bando → li-
• modemu → i-

That is why you get:

• bando limeisha
• modemu ilikuwa imezimwa

This is one of the most important things to get used to in Swahili: verbs change to match the noun class of the subject.

Ilikuwa imezimwa gives a sense of a state that was already true in the past.

Breakdown:

• ilikuwa = it was
• imezimwa = switched off / turned off

Together, ilikuwa imezimwa means something like:

• it was switched off
• it had been switched off
• it was in an off state

This works very naturally here, because the sentence is explaining the real situation behind the misunderstanding.

If you said ilizimwa, that would sound more like a simple past event: it was switched off.
But ilikuwa imezimwa focuses more on the condition the modem was in when they discovered the problem.

imezimwa can be broken down like this:

• i- = subject agreement for modemu
• -me- = perfect marker
• zim = root from kuzima / zima, related to switching off or going off
• -w- = passive
• -a = final vowel

So imezimwa means it has been switched off or it is switched off depending on context.

The passive is used because the modem is the thing affected by the action. The sentence does not say who switched it off.

Tu means just, only, or simply.

In this sentence, it downplays the explanation:

• modemu ilikuwa imezimwa tu = the modem was just switched off
• or the modem was simply off

It gives the sense that the problem was not complicated after all.
They thought the data bundle was finished, but the real reason was only that the modem was off.

Yes. A fairly literal breakdown is:

• Tulifikiri = We thought
• bando = the data bundle
• limeisha = has finished / has run out
• kumbe = but as it turns out
• modemu = the modem
• ilikuwa imezimwa tu = was just switched off

So the whole sentence is roughly:

We thought the data bundle had run out; as it turns out, the modem was just switched off.

That is a very natural kind of Swahili sentence: first the mistaken assumption, then kumbe introduces the real explanation.