Patent FR1028415A successfully refreshed from Google Patents.
EP0644703A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Mobile equipment for cellular telephony
Assignee: Nokia Oyj
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Filing: 1994-04-28
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Granted: —
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Expires: 2014-04-28
Abstract
Abstract Mobile equipment for a cellular telephone system has its software modified so that the equipment can restore to usability a SIM card in a locked state. The software detects if a datafield on the SIM card can be read, detects if an unreadable datafield can be written to and, if it can, writes initial information into the unreadable datafield to restore the SIM card to usability.
Inventors
- 👤 Sakari Pelkonen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:05
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
Mobile equipment for a cellular telephone system, the equipment having first means for detecting if a datafield on a SIM card can be read, second means for detecting if an unreadable datafield can be written to and third means for writing initial information into said unreadable datafield in the event of the second means detecting that the unreadable datafield can be written to.
Claim 2
Dependent Claim
27 words
Mobile equipment according to claim 1, wherein the initial information corresponds to the information in that datafield when the SIM card is obtained from the system operator.
Claim 3
Dependent Claim
15 words
Mobile equipment according to claim 1 or 2, and in combination with a SIM card.
Claim 4
Dependent Claim
25 words
Mobile equipment according to claim 3, wherein said datafield is one of a plurality of datafields which can be written to on the SIM card.
Claim 5
Independent Claim
58 words
A method of restoring to usability a SIM card which is in a locked state as a result of having an unreadable datafield, comprising detecting if a datafield on the SIM card can be read from associated mobile equipment, detecting if an unreadable datafield can be written to and, if it can, writing initial information into said datafield.
Claim 6
Dependent Claim
28 words
Mobile equipment for a cellular telephone system, or a method of restoring to usability a SIM card, substantially as herein particularly described with reference to the accompanying drawing.
References Cited (Backward Citations)
No citation records indexed.
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