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Call Success Rate Survey - April - September 2002, published December 2002 Layout image
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National (UK)

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

97.6

98.7

98.9

0.2

Orange

97.8

98.8

99.0

0.2

T-Mobile

96.0

97.6

98.4

0.3

Vodafone 98.3 98.9 99.4 0.2

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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East Anglia

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

97.9

98.5

99.3

1.0

Orange

99.6

99.9

99.7

0.4

T-Mobile

97.3

98.2

99.0

1.1

Vodafone 99.4 99.5 99.9 0.5

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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London

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

97.2

98.2

99.0

0.5

Orange

97.6

98.8

98.8

0.5

T-Mobile

97.9

98.8

99.1

0.4

Vodafone 98.3 98.9 99.4 0.4

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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Midlands

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

98.3

99.1

99.2

0.4

Orange

98.0

98.9

99.1

0.4

T-Mobile

96.2

97.7

98.5

0.6

Vodafone 98.7 99.2 99.5 0.4

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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Northern England

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

97.7

98.8

98.9

0.4

Orange

97.7

98.9

98.8

0.4

T-Mobile

96.7

97.9

98.8

0.5

Vodafone 98.4 99.0 99.4 0.4

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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Northern Ireland

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

98.5

99.4

99.1

0.7

Orange

99.1

99.3

99.7

0.6

T-Mobile

97.2

98.8

98.4

1.0

Vodafone 97.0 97.7 99.3 1.1

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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Scotland

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

96.9

98.3

98.5

0.8

Orange

97.9

98.7

99.2

0.6

T-Mobile

93.6

95.7

97.8

1.1

Vodafone 97.9 98.5 99.3 0.7

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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South East England

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

98.1

98.9

99.2

0.5

Orange

98.4

99.2

99.2

0.5

T-Mobile

96.2

97.7

98.4

0.7

Vodafone 98.7 99.3 99.4 0.4

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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South West England

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

97.3

98.6

98.7

0.8

Orange

97.6

98.8

98.8

0.8

T-Mobile

94.0

96.8

97.1

1.2

Vodafone 99.1 99.6 99.5 0.5

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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Wales

Company

Calls connected and completed successfully

Successful set-ups

Successfully-held calls

95% Confidence Range

O2

95.1

97.34

97.7

1.3

Orange

95.0

96.8

98.1

1.3

T-Mobile

89.8

93.8

95.8

1.8

Vodafone 95.4 97.2 98.2 1.3

The results are based on a sample of calls only and are subject to a small margin of error. This error is usually represented by a confidence range. A 95% confidence range means that users can be 95% confident that the true value of the result in question actually lies within that range.

During the testing period, the model of antenna used by all operators became unavailable and as such needed to be replaced. Due to operational reasons O2 had to replace some of its antennas in advance of other operators. The effect of operators using different antennas has yet to be determined.

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