The line graph compares the average monthly contract costs (in euros) of four cellular providers – Domo, Lex, SIM TX and Alpha – in a European country between January and September 2012.
Overall, prices for Domo, Lex and Alpha rose over the period, whereas SIM TX’s rates declined after mid-year. Notably, Domo began the year with the highest tariffs but was ultimately surpassed by Alpha by September.
From January to June, Domo’s charges climbed steadily from €15 to €20. Lex increased more gradually, moving from €12 in January to €13 by June. SIM TX showed robust growth in the first half, doubling its fee from €8 to €14. In contrast, Alpha’s contract cost fluctuated narrowly around €5, dipping to €4 in April before rebounding to €5 in June.
In the second half of the year, Domo peaked at €25 in July but then eased back to €23 in September. Lex maintained its upward trajectory, reaching €18 by the end of the period. SIM TX, however, experienced a sharp reversal, with its price falling from €14 in July to €8 in September. Most strikingly, Alpha’s rate surged from €6 in July to €25 in September, overtaking all other providers to become the most expensive by the close of the period.