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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteThe safest method is to back up the Japanese flip phone before changing or resetting it, then use the route that the exact model supports: a compatible memory card, infrared or Bluetooth for compatible handset pairs, or carrier assistance. Memory-card phonebook backup is documented by SoftBank, while photo transfer and wireless compatibility vary by model. An iPhone cannot receive infrared transfers, and au’s Data Migration app cannot use a 4G LTE feature phone as its source.
Start by protecting the old phone
Do not trade in, reset, cancel service on, or discard the ガラケー (garakei) until the new smartphone contains the contacts and photos you actually need. A Japanese feature phone can become harder to operate after a model change. SoftBank specifically warns that, after changing devices, the old handset may no longer be usable for saving data to a memory card.
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Charge both devices, keep the old phone switched on, and make a written list of irreplaceable information. That list should include telephone numbers, email addresses, postal addresses, birthdays, notes, and the photos you cannot replace. A transfer can preserve names and numbers while omitting less common contact fields, so checking only the contact count is not enough.
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Identify the exact handset
Find the model number printed on the phone, beneath the battery, on its original box, or in the handset’s settings. Record the mobile carrier as well: menus and support options differ between carriers and models. Also check whether the phone has a microSD or other memory-card slot. Japanese flip phones that look similar can use different card formats, have different capacity limits, or offer different backup menus.
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Use the official manual for that exact model before selecting a procedure. Look specifically for entries such as phonebook backup, memory-card save/read, image copy, infrared, Bluetooth, and data transfer. The menu wording in one model’s manual is not a promise that another model has the same function.
Choose a transfer route
There is no universal Japanese flip-phone migration procedure. Select a route only after checking both the source model and the receiving smartphone.
| Route | What the published guidance establishes | Main limitation to check |
|---|---|---|
| Memory card | SoftBank documents saving the phonebook to a memory card before inserting or reading that card on a new Android smartphone. | The old phone’s manual must confirm the card type, capacity, and whether photos can also be copied. The new smartphone may need a card slot or a suitable reader. |
| Infrared | SoftBank lists infrared as a possible phonebook method for compatible handset pairs. | iPhone has no infrared function. Compatibility and the data categories that transfer vary by handset. |
| Bluetooth | SoftBank lists Bluetooth as another possible phonebook method. | Both devices must support a compatible transfer function, and the manual must identify the data category that can be sent. |
| Carrier app or shop | au’s Data Migration app can move address books, images, and video for eligible Android and iOS devices. SoftBank describes carrier assistance for migration. | au requires an au ID, has OS and device eligibility rules, and excludes 4G LTE feature phones as source devices. Availability and supported data depend on the carrier and model. |
When comparing methods, ask five questions: Does the exact old model support it? Is the destination Android or iPhone? Does it cover phonebook entries, photos, video, or only one category? Does it require a card, reader, account, or shop visit? Can you verify the result while the old phone is still available?
Method 1: use a compatible memory card
A memory card is usually the clearest documented bridge when the old handset supports it. SoftBank’s phonebook instructions use a memory-card save/read process, but the exact menu sequence differs by model.
Prepare the card and devices
- Read the old phone’s manual to identify the supported card type and capacity. Buy or reuse only a compatible microSD memory card for that model; do not assume that a modern high-capacity card will work simply because it fits physically.
- Check how the new smartphone will read the card. Some Android phones have a card slot; others require a card reader or adapter. An iPhone does not receive infrared, so a card-based route or carrier-supported route is the relevant alternative when the old phone cannot send wirelessly.
- If the card contains existing files, copy them somewhere safe before using it. A backup made on the old handset should not be your only copy.
Save the phonebook on the old handset
- Insert the card into the old phone while it is powered off if the manual recommends that procedure.
- Open the phonebook or data-management menu and choose the model’s memory-card backup or save command. SoftBank’s documented example saves all phonebook items; your model may use different labels.
- Choose all entries if the handset offers that option, then wait for the save operation to finish. Do not remove the battery or card during the operation.
- Write down the result shown by the phone, such as a completion message or item count. This gives you a reference when checking the smartphone.
Phonebook backup does not automatically prove that photos were copied. Consult the same manual for image or video copy commands. Some phones store photos in internal memory, on the card, or in separate folders; the documented phonebook operation alone does not establish photo coverage.
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Read the card on the smartphone
- Insert the card into the Android smartphone, or connect it through a compatible reader or adapter. Follow the smartphone maker’s instructions for importing contacts from removable storage.
- If the smartphone presents several contact sources, select the card backup file created by the old phone. Choose the destination account or device storage only after confirming that it is the account you intend to use.
- For photos, open the card’s image folders and copy or import the files using the smartphone’s file or photo app. The folder names and import choices depend on the old phone and the receiving phone.
- After copying, eject the card using the phone’s storage controls before removing it.
If the new phone cannot read the card, do not format it. Formatting can erase the only backup. Try the model-approved reader or another compatible phone, and consult the old handset’s manual or carrier support before taking any destructive action.
Method 2: infrared or Bluetooth between compatible phones
SoftBank identifies infrared and Bluetooth as possible alternatives for phonebook transfer, but neither is universal. The two handsets must support compatible functions, and the manual must say that the desired category—contacts, photos, or another file type—can be transferred.
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Infrared
Infrared is relevant only when both devices have infrared hardware and compatible send/receive commands. Open the transfer function on each phone and follow the prompts in both manuals. Keep the devices positioned as the manuals specify and wait for the completion message before closing the operation.
Do not plan an infrared transfer to an iPhone. SoftBank states that iPhone has no infrared function. SoftBank also warns that compatibility and the data that can be transferred vary by handset, so a successful contact transfer does not establish that photos will transfer the same way.
Bluetooth
Bluetooth can work for some model pairs, but the presence of a Bluetooth menu is not proof that the phonebook or images can be sent. Confirm in both manuals that the relevant data category is supported. Pair the devices only through their documented transfer workflow, approve the pairing code when both displays agree, and keep both phones awake until the operation reports completion.
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If the phones can pair but the send command is missing, the pairing may support audio or another accessory profile rather than data migration. Use the memory-card route or carrier assistance instead of repeatedly attempting unsupported transfers.
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Method 3: carrier help and migration apps
SoftBank support
SoftBank’s official guidance describes shop assistance, memory-card phonebook backup, and infrared or Bluetooth alternatives. A shop can be useful when you cannot identify the menu, card format, or receiving-phone procedure. Ask what data categories the service will handle and whether you should make a separate backup before handing over the old handset.
SoftBank’s migration overview also notes that the data available for transfer depends on the devices. Treat a carrier-assisted move as a process to verify, not as a guarantee that every contact field, image, or video will arrive.
au Data Migration
au’s Data Migration service lists address books, images, and video among the supported categories for eligible Android and iOS devices. It requires an au ID and is subject to the app’s operating-system and device requirements. Crucially, au excludes 4G LTE feature phones as source devices. If the old handset is a 4G LTE feature phone, this app is not a valid source-to-smartphone route.
Check au’s current eligibility instructions for both the old and new devices before deleting anything. If the app refuses the source phone, stop there and switch to the model’s memory-card procedure, a supported wireless method, or carrier-shop assistance.
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Moving photos requires a separate check
Contacts and photos are different data types. A phonebook backup may create a contact file without touching images, while a photo operation may omit contacts entirely. Before choosing a route, determine where the pictures are stored and which command the old phone’s manual provides.
- Photos on a memory card: confirm whether the files are already on the card and whether the smartphone can read that card or a reader. Copy the image files, then open several of them on the new phone.
- Photos in internal storage: look for an image-copy or send command in the old model’s manual. Do not assume that saving the phonebook also exports internal photos.
- Wireless photo transfer: use infrared or Bluetooth only when both manuals explicitly support image transfer. SoftBank’s infrared guidance does not guarantee every device combination or every data category.
- Carrier migration: au lists images and video for eligible devices, but its source-device exclusion still applies. Carrier support should confirm what will be included before the operation begins.
Check more than thumbnails. Open photos from different dates, confirm that they display at full usable size, and look for videos if those matter to you. A file that appears in a folder but will not open may be incompatible or incomplete.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Android and iPhone destination differences
Android
Android is the destination explicitly described in SoftBank’s memory-card phonebook example. Depending on the model, you may read the card directly or use a reader. The phone’s contact-import screen and account choices vary by manufacturer, so follow the receiving phone’s instructions after the old handset has created its backup.
An Android phone may accept a removable card, but that is not universal. Confirm the exact model’s storage hardware before buying a card or adapter.
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An iPhone cannot receive an infrared transfer because it has no infrared function. For an iPhone destination, prioritize a compatible memory-card reader and an official carrier route that accepts the source handset. au’s service includes eligible iOS destinations, but the au ID, operating-system, and source-device rules still apply.
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Do not buy an infrared accessory expecting it to make the iPhone compatible with the old phone’s infrared menu. If the old handset’s only documented export is infrared, ask the carrier whether a shop-assisted or card-based alternative exists before changing devices.
Verify everything before wiping the old phone
Verification is part of the transfer, not an optional cleanup step. Device and data differences can prevent a complete migration, according to the cited carrier guidance.
- Compare the number of contacts on the new smartphone with the old phone’s count.
- Open important entries and check names, telephone numbers, email addresses, and notes—not just the presence of a name.
- Open representative photos from different dates and folders. Check that they are viewable and at the expected resolution.
- Test a few important phone numbers from the new phone, using a safe call or message procedure.
- Confirm that any required videos or other files are present if the chosen route claimed to support them.
- Keep the old phone and the backup card untouched until these checks pass. Only then reset, trade in, or dispose of the old handset.
Troubleshooting by symptom
The card is not recognized
- Recheck the exact card type and capacity in the old phone’s manual.
- Confirm that the card was saved by the old phone rather than merely inserted.
- Try the manufacturer-approved reader or adapter on the new phone.
- Do not format the card when prompted if it contains the only backup; formatting can erase the data.
Contacts transferred but fields are missing
- Compare several original entries with their new versions, including email addresses, notes, and secondary numbers.
- Check whether the old model’s backup command saves all fields or only basic phonebook data.
- Ask the carrier whether its supported migration path handles the missing fields before repeating the transfer.
Photos are absent
- Determine whether the pictures were stored in internal memory or on a card.
- Run the model’s image-copy procedure separately from the phonebook backup.
- Check the receiving phone’s file or photo app for imported folders instead of relying only on the camera-roll view.
- If the wireless method moved contacts only, switch to a documented image-capable route.
The wireless transfer cannot start
- Confirm that both devices support the same transfer function and data category.
- For infrared, rule out an iPhone destination and check the model manuals.
- For Bluetooth, distinguish ordinary accessory pairing from a phonebook or file-transfer command.
- Use a memory card or carrier help when the pair is not documented as compatible.
The carrier app rejects the old phone
Check the eligibility rules, account requirement, operating-system versions, and source-device category. In particular, au’s Data Migration app excludes 4G LTE feature phones as source devices. An eligibility failure is a boundary of the service, not evidence that the phone’s data is lost; use the handset manual, a card route, or carrier-shop assistance instead.
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Use this order when you are unsure which route to try:
- Model first: write down the old phone’s exact model and carrier.
- Backup before change: save the phonebook and any supported photos while the old phone remains operational.
- Check the destination: identify whether the new phone is Android or iPhone and whether it accepts a card or reader.
- Match the data category: verify contacts and photos separately; do not infer photo support from phonebook support.
- Use the least ambiguous supported route: a documented memory-card workflow, a model-compatible wireless method, or eligible carrier help.
- Verify in detail: inspect contact fields and open real photos before resetting the old handset.
The correct transfer method is the one documented for your particular handset pair, not the one that happens to work on a different Japanese flip phone. Preserve the original until both contact and photo checks are complete.
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