Over the past few months, AT&T ( T ) has made significant adjustments to its pricing, which has frustrated a few of its customers.

Last year in August, AT&T increased the monthly price for most of its retired unlimited wireless plans by $10 for customers with one phone line and $20 for customers with multiple lines.

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In November, AT&T also hiked the monthly price for its fiber and internet plans by $5. Also, in April this year, AT&T even decreased its autopay discount from $10 to $5 for phone and internet customers who pay their bills with debit cards.

Related: AT&T's response to a growing threat spells trouble for customers

Those who pay their bills with credit cards had their autopay and paperless billing dis

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