Phone shop inventory drifts quietly. A battery gets fitted but never added to the ticket, a delivery arrives two screens short, a case is sold under the wrong variant. After a few weeks the system says you have three iPhone 18 Pro screens, the drawer is empty and a customer is waiting. A regular stock count is how you catch it.
The answer isn't a yearly count that eats a Sunday. It's a short count every week, focused on the items that matter most. Here's a 20-minute routine, plus what to do when the numbers don't match.
Why phone shop inventory drifts
Most differences come from a handful of everyday gaps:
- Parts used on repairs but not recorded on the ticket.
- Deliveries shelved before they're received, or a partial delivery received as complete.
- Near-identical items mixed up at the counter, such as the wrong screen for a similar model or a clear case for the wrong phone.
- Parts broken during fitting and binned without a note.
- Faulty parts sent back to the supplier with no return on record.
- Stock carried to another store without a transfer.
These are process gaps, not counting problems. A weekly count finds them while they're small and people still remember what happened.
The 20-minute weekly stock count, step by step
Pick a fixed slot, such as before opening on your quietest weekday. Keep the same person leading it, and rotate the helper so everyone learns the routine.
Step 1: Freeze and prepare (2 minutes)
- Finish or park any sale, delivery or transfer in progress. Counting moving stock gives wrong answers.
- Check open repair tickets. Any part already committed to a job should be on its ticket and set aside (more on this below).
- Have the scanner and this week's count list ready.
Step 2: Count the fast movers (8 minutes)
Every week, count the 15 to 25 items you use or sell most. For most phone repair shops that list looks something like this:
- Galaxy S26 batteries
- iPhone 18 Pro screens
- charging ports for your most-repaired models
- your best-selling cases and screen protectors
- fast chargers and cables
These move daily, so they drift fastest, and running out costs you a repair today. Count them blind: write down what's on the shelf before you look at the system, or you'll tend to "find" the number you expect.
Step 3: Count this week's rotating category (8 minutes)
Then count one wider category, rotating so the whole shop is covered every four weeks:
| Week | Category | Watch for |
|---|---|---|
| 1 | Screens and displays | Model mix-ups, parts broken during fitting |
| 2 | Batteries, charging ports and small parts | Parts used on tickets but not recorded |
| 3 | Cases, protectors, cables and chargers | Wrong variant sold at the counter |
| 4 | Devices and high-value items | Any unit that isn't where the system says |
For devices, check each IMEI, not just the quantity. Four phones on the shelf is only right if they're the four phones the system expects.
Step 4: Enter, compare and note (2 minutes)
Scan or enter the counts, then list every line where shelf and system disagree. Don't adjust anything yet.
Handling discrepancies without guessing
A difference is a question, not an answer. Before adjusting stock, check the usual suspects in order:
- Open repair tickets. Was a part fitted but not added to the job?
- Recent deliveries. Was something received in the system but not unpacked, or unpacked but not received?
- Supplier returns. Did faulty parts go back without a return recorded?
- Transfers. Is stock on its way to or from another store?
- Look-alikes. Is the "missing" part sitting in the slot next door?
A worked example. The system shows 12 iPhone 18 Pro screens; the shelf has 10. The ticket check finds a screen fitted on Thursday but never added to the repair. You add it to the ticket, which also corrects that job's margin, and the system now shows 11. The last screen has no explanation, so you adjust stock by one with the reason "unexplained, weekly count". At €64 cost, that's a loss worth tracking.
A few rules keep this honest:
- Record a reason with every adjustment, every time.
- Investigate differences on screens and devices the same day. A single cable or protector can be adjusted with a note.
- Review the reasons once a month. If "fitted but not recorded" keeps coming up, fix the habit at the bench rather than counting harder.
Parts reserved for repairs
This causes the most confusion in a repair shop count. A screen ordered for a customer sits on the bench, waiting for the device. Is it stock or not?
Treat it like this:
- As soon as a part is committed to a job, put it on the repair ticket. In Phonesol, a part added to a ticket comes out of stock, with its cost on the job.
- Keep it physically separate, in a bag or tray labelled with the ticket number, away from shelf stock.
- Don't count it as shelf stock. It's already accounted for on the ticket.
- If the customer cancels, put the part back into stock and back on the shelf the same day, so the system and the shelf agree again.
Your shelves then only hold stock that's free to use, and your counts and low stock alerts reflect reality.
Reorder points that match how fast you sell
A reorder point is the stock level at which you place the next order. A simple way to set one:
Reorder point = average weekly use × supplier lead time in weeks + a safety buffer
- Galaxy S26 batteries: you fit about 6 a week, your supplier takes 1 week and you keep 3 spare. Reorder point = 6 × 1 + 3 = 9. When stock drops to 9, order enough for the next two weeks, about 12.
- iPhone 18 Pro screens: you fit about 4 a week, delivery takes 2 weeks and you keep 2 spare. Reorder point = 4 × 2 + 2 = 10.
- A slow-selling case: it sells about once a fortnight. A reorder point of 1 or 2 is plenty, and it stops slow stock tying up cash.
Check these monthly against your sales and parts-used reports. Usage shifts quickly when popular models change.
Low stock alerts people actually act on
An alert only helps if someone owns it.
- Set reorder levels on your step 2 fast movers first.
- Make one person responsible for alerts and orders each day.
- Turn an alert into an order the same day: a purchase order for planned buying, or a quick purchase for an urgent local buy.
- When the delivery arrives, receive what actually came in. If 16 of 20 screens arrive, receive 16 and leave 4 pending. Then label and shelve them.
Too many alerts are as bad as none. If one fires weekly for an item you don't care about, lower its reorder level or remove it.
How Phonesol supports the routine
Inventory management for phone repair shops in Phonesol covers each part of this routine:
- Low-stock alerts from reorder levels you set, with stock levels by store.
- Parts linked to device models and repairs, coming out of stock when used on a ticket.
- IMEI and serial tracking for every device.
- Barcode labels printed singly or in batches, and scanning during receiving, transfers and stock counts.
- Purchase orders and quick manual purchases, with partial receiving and supplier returns.
- Supplier records with price history and outstanding credits.
- Inventory reports showing stock value, slow movers and parts used.
- Transfers between stores, with changes traceable by staff and store.
Start from 3,000+ ready-made products, and we'll help you import your existing stock list.
Try it in your shop
Phonesol comes with a 14-day free trial, no card needed. Set up your top 20 fast movers with reorder levels and run your first weekly count with a scanner. If you'd like a walkthrough first, book a demo, or see plans and pricing.