Which is better for selling your phone? We're here to tell you that the quote you're shown only matters if it's what you actually get paid.
Mazuma Mobile and The Big Phone Store can both give you a quick online valuation and both offer same-day payment on qualifying trade-ins.
So the real difference is how your phone is valued before you send it.
At The Big Phone Store, we don't believe a phone with one small issue should automatically be treated the same as a badly damaged device. Our trade-in pricing uses thousands of individual condition combinations, allowing us to account for the actual battery, screen, body and faults of your device. 99.8% of customers receive the exact price they were quoted.
.png)
Think about your current phone
Maybe the battery isn't what it used to be
Maybe there's a scratch on the back, but the front is spotless
Maybe there's no physical damage, but it won't power on
That doesn't mean the rest of your phone has suddenly lost its value.
Mazuma currently grades mobile phones into three broad categories: Excellent, Good and Faulty. The Big Phone Store takes a more detailed approach: We ask about individual faults as part of the valuation, then use that information to calculate your exact price before you send the phone.
A worn battery is priced as a worn battery
A cracked back is priced as a cracked back
a scratch is priced as a scratch
You aren't forcing your whole phone into the nearest condition box.
Category | The Big Phone Store | Mazuma mobile | What does that mean? |
|---|---|---|---|
How your phone is valued | Thousands of individual condition combinations on iPhone trade-ins | Excellent, Good or Faulty grading | We can account for individual issues rather than relying only on a broad condition category. |
Battery conditions | Asked about and factored into the valuation upfront | Under 80% battery health falls into Faulty under current grading criteria | Batteries only account for a small part of pricing, we don't consider low-battery phones "faulty". |
Quote confidence | 99.8% of customers receive the exact quoted price | Quoted price paid when the device meets Mazuma's stated criteria; otherwise a revised valuation may be offered | We don't hold you to strict criteria, we quote you based on what you actually have. |
Broken or imperfect phones | Individual faults can be priced separately | Faulty category covers devices that fall outside Excellent or Good requirements | "Broken phones" is a vague term that we're trying to steer away from |




There is a particular kind of frustration with phone trade-ins:
You see a good price.
You send your phone away.
Then you find out the final valuation isn't what you expected.
We'd rather remove as much of that uncertainty as possible, which is why 99.8% of customers receive the exact price they were quoted.
So instead of posting your phone and crossing your fingers, you have much more confidence in what it is actually worth.
Don't assume you need to repair it before selling it.
The Big Phone Store buys phones with cracked screens, damaged backs, degraded batteries and other faults.
The important part is just being honest.
Our system can then account for any issues when working out your price.
A phone doesn't have to be perfect to still be worth good money.
Mazuma has built their reputation around making phone trade-ins quick, including same-day payment, but being paid quickly and receiving the price you expected aren't always the same thing.
The Big Phone Store also offers same-day payment, so we wouldn't tell you to choose between us based on that alone, but we would say that just being paid quickly isn't as good as being paid what you expect to be paid quickly.



Most used phones don’t fit neatly into one condition box. We look at the individual condition of your phone, so one fault doesn’t automatically define the value of the whole device, so the valuation is built around your actual phone, not just a broad grade.
Your phone could be worth more than you think.
Don’t settle for a broad estimate.