Advisory note AN-12
Price changes
What a provider must tell you before you sign, how a monthly figure rises, and every route by which it may be brought down.
Independent status. fernwick is an independent guidance and information service. We are not a mobile network. We are not affiliated with, endorsed by, appointed by or connected to Three, EE, O2, Vodafone, Sky Mobile, Tesco Mobile or any other provider, and we hold no commercial arrangement with any of them. We do not sell, supply, arrange or broker SIM cards, contracts, handsets or services of any kind, and we take no commission. Everything published here is general information and must not be relied upon in place of the provider's own current terms.
Our position in one line
A bill rises for four foreseeable reasons and falls for five deliberate ones — none of the second group happen without you acting.
§1How a bill rises
| Cause | What is behind it |
|---|---|
| A mid-contract increase | Permitted, but since January 2025 it must be stated in pounds and pence before you sign |
| An introductory discount ending | The most common cause, and entirely foreseeable — the duration is stated at purchase |
| Charges beyond the allowance | Arise only where no spend cap was set. Roaming and premium-rate services are the usual sources |
| A term that ended | Not strictly an increase, but the effect is the same: a figure that should have fallen did not |
| An add-on left running | Single-period purchases occasionally renew. Review the statement after any heavy month |
If any of this is unclear
Telephone the advisory and we will talk it through. There is nothing to buy at any point.
020 3896 5248This line is for guidance and information only. We sell nothing, arrange nothing and act for no provider. If anything on this page is unclear, telephone and we will explain it.
§2How a bill falls
Never by itself. Five deliberate actions bring it down.
| Action | Effect |
|---|---|
| Move to SIM-only at term end | Removes the handset element entirely — the largest single reduction available to most households |
| Right-size the allowance | Where three months of usage shows the tier is oversized |
| Buy an add-on rather than upgrade | Covers one heavy month without repricing the other eleven |
| Settle device credit early | On a split contract, leaving only the airtime charge |
| Negotiate with competing quotes | Best done with a switching code already in hand, so you are comparing rather than asking |
§3What must be disclosed to you
- Any mid-contract increase, in pounds and pence, before signature.
- Any early-termination charge and device balance, itemised, before you commit to leaving.
- The fair-use ceiling applying to an unlimited allowance abroad — a published figure you are entitled to know.
- On a split contract, the device and airtime elements shown separately on the statement.
§4Disputing a charge
In writing, not by telephone. A written complaint with dates, facts and the outcome you want creates a record and a reference; a phone call creates neither.
Write, setting out dates, facts and the outcome sought. Keep the reference.
Keep a dated log if the problem repeats.
At eight weeks unresolved — or immediately on a final response — refer it free to the Communications Ombudsman.
Remember the determination binds the provider and does not bind you.
Common pitfallMost complainants give up at around six weeks, two stages short of the point at which free, binding escalation becomes available.
Speak to the advisory
Telephone the advisory and we will talk it through. There is nothing to buy at any point.
020 3896 5248This line is for guidance and information only. We sell nothing, arrange nothing and act for no provider. If anything on this page is unclear, telephone and we will explain it.
Independent status. fernwick is an independent guidance and information service. We are not a mobile network. We are not affiliated with, endorsed by, appointed by or connected to Three, EE, O2, Vodafone, Sky Mobile, Tesco Mobile or any other provider, and we hold no commercial arrangement with any of them. We do not sell, supply, arrange or broker SIM cards, contracts, handsets or services of any kind, and we take no commission. Everything published here is general information and must not be relied upon in place of the provider's own current terms.