When Jimmy is shaving and talking with Kim, the right side of his face is unshaven, but moments later as he turns to talk to Kim, there's no shaving cream.
If you call 911 and hang up, the police will come and the operator will continue to call the number back to ascertain the situation. The phone line is essentially locked to emergency services until the operator releases it.
While Jimmy is at CC Mobile, there's a sign (in Spanish) that says "2 Lineas Datos Ilimitados $50". This translates as "2 Lines Unlimited Data $50". This show is set, roughly, between 2002 and 2004 and before the first "smartphone" appeared (the first iPhone was introduced in 2007). So the need for a data package (especially an unlimited one) was not even on consumer's minds for their "Slide" or "Flip" phones.