If the amount of data communication used in a given month exceeds a certain amount according to your rate plan, your data communication speed will be slowed down until the end of the billing month as follows.
| Simple 2 S | Simple 2M | Simple 2 L | ||
|---|---|---|---|---|
| Communication speed when data limit is exceeded * () indicates when data increase option is applied |
1st stage | 4-6GB (6-8GB) |
20-30GB (25-35GB) |
30-45GB (35-50GB) |
| Up to 300kbps | Up to 1Mbps | |||
| 2nd stage | Over 6GB (Over 8GB) | Over 30GB (Over 35GB) | Over 45GB (Over 50GB) | |
| Up to 128kbps | ||||
You can restore normal speeds by purchasing additional storage using one of the methods below.
You can proceed directly to the My Y!mobile procedure page by clicking the link in the message we send you when your data speed slowdown begins.
You can check and change it on My Y!mobile.
Please refer to here for specific steps.
You can set this at the customer center (automated voice guidance).
Please prepare your contract phone number and PIN (4 digits) for the procedure.
You can use some menus without having to enter your PIN.
What you can do with this number (list of voice guidance)
[Reception hours] 24-hour reception via automated voice response (open all year round)
| From Y!mobile phone | 116 |
|---|---|
| From other companies' mobile phones, landlines, etc. | 0120-921-156 |
Please have your contract phone number and My Y!mobile login password ready to complete the procedure.
If you are using this service for the first time, please prepare your contract phone number and PIN (4 digits).
What kind of documents are required to verify family status? [Family Discount Service / Home Discount Electricity Set (A) / Home Discount Hikari Set (A)]
How do I transfer from Y!mobile to another company (MNP)? [Mobile Number Portability (MNP)]
Can I pay the remaining device price in one lump sum?
Please tell me how to unlock the SIM.
[If you are currently under contract] How can I check my billing amount, such as my monthly usage fee?